British Saturday Beef Supper

1. FINAL MENU

• Name of the meal: British Saturday Beef Supper
• Cuisine type: British / Irish
• Serve time: 17:00

One paragraph rationale: A straightforward British supper that celebrates well‑cooked beef and classic accompaniments: warm, crisp, chip‑style roast potatoes; sweet peas brightened with mint; and simply seasoned sirloins finished with a punchy mustard‑rosemary compound butter. The plan keeps active work under 20 consecutive minutes, leans on the oven for passive roasting, and times the steak so it is grilled and plated within minutes of the 17:00 serve, giving you a relaxed, reliably tasty family meal with planned leftovers.

• Grilled Sirloin Steaks with Mustard & Rosemary Butter
• Oven-Roasted "Chippy" Potatoes
• Buttered Minted Peas

2. FULLY EXECUTABLE RECIPES

Grilled Sirloin Steaks with Mustard & Rosemary Butter

Equipment

• 25–28 cm heavy grill pan or outdoor grill (cast-iron preferred)
• Instant-read meat thermometer
• Small mixing bowl
• Kitchen scale
• Tongs
• Sheet of baking paper or cling film for butter shaping

Ingredients

• Beef sirloin steaks: 4 steaks, 200 g each (total 800 g)
• Olive oil: 10 ml
• Sea salt: 8 g
• Black pepper, freshly ground: 3 g
• Unsalted butter (for compound butter): 60 g
• Dijon mustard: 20 g
• Fresh rosemary, finely chopped: 4 g

Practical substitutions:

• If sirloin is unavailable, use ribeye or rump steaks, 200 g each (similar thickness).
• If fresh rosemary is not available, substitute 1 g dried rosemary, crushed (use 1/4 the fresh weight).

Cooking / Baking

• Grill pan temperature: preheat to very hot (pan surface ~230–260°C if measured).
• Target doneness: medium (internal temp 57°C). Adjust to preference: 52°C rare, 63°C medium‑well.
• Total cook time: 8–12 minutes active (does not include short plating/rest window).

Instructions

1. Remove steaks from fridge 10 minutes before cooking while you preheat the grill pan (do not exceed 30 minutes at room temperature).
2. Make the compound butter: in a small bowl, mash 60 g unsalted butter with 20 g Dijon mustard, 4 g chopped fresh rosemary, 2 g sea salt and 1 g black pepper until smooth; form into a small log on baking paper and set aside at room temperature (soft but not melted). (2–3 minutes)
3. Season steaks: brush both sides lightly with 10 ml olive oil, then sprinkle evenly with 8 g sea salt and 3 g black pepper. Press seasoning into the meat. (1 minute)
4. Preheat a 25–28 cm heavy grill pan over high heat for 5–7 minutes until smoking-hot. (preheat during timeline). (active waiting)
5. Grill steaks: place steaks on the hot grill pan and cook, undisturbed, for 4 minutes on the first side; flip and cook 3–4 minutes on second side for medium (target 57°C internal). Use tongs and an instant-read thermometer to verify doneness. Total active grilling 7–8 minutes. (8 minutes)
6. Rest & finish: transfer steaks to a warm tray; top each steak with a 15 g slice of the mustard‑rosemary butter and let rest briefly while plating (2–3 minutes). Serve immediately. (2–3 minutes)

Total cook time: 10 minutes active (plus short rest), end-to-end roughly 12 minutes including finishing.

Oven-Roasted "Chippy" Potatoes

Not low-carb: potatoes.

Equipment

• Large pot (4 L) with lid
• 30 x 40 cm rimmed baking sheet (one sheet)
• Colander
• Wooden spoon and bowl for roughing
• Oven set to 220°C (conventional) / 200°C fan

Ingredients

• Maris Piper or Yukon Gold potatoes: 1.2 kg (approximately 300 g per person)
• Cold water: enough to cover potatoes in pot (~2.5 L)
• Sea salt (for parboil): 12 g
• Olive oil: 30 ml
• Fresh rosemary sprigs: 6 g (use leaves only, roughly chopped)
• Sea salt (to finish): 6 g
• Black pepper, freshly ground: 1 g

Practical substitutions:

• If Maris Piper/Yukon Gold not available, use any all‑purpose or floury potato (e.g., Russet) — adjust roast time +5–10 minutes for very floury potatoes.
• If fresh rosemary unavailable, use 1 g dried rosemary (crushed).

Cooking / Baking

• Oven temperature: 220°C (fan 200°C)
• Total cook time: 45 minutes (approx): 12 minutes parboil + ~30 minutes roast + roughing and tossing time.

Instructions

1. Preheat oven to 220°C (200°C fan). Place a rimmed sheet pan in the oven to heat. (preheat step)
2. Peel (optional) and cut potatoes into thick chip-style pieces about 2–3 cm wide. Place cut potatoes into a large pot and cover with cold water (≈2.5 L). Add 12 g sea salt to the water. (5 minutes)
3. Bring to a vigorous boil, then reduce to medium-high and parboil for 10–12 minutes until the exterior is just tender but not falling apart. (10–12 minutes)
4. Drain potatoes in a colander and let steam dry 1 minute. Return to pot or bowl and rough the edges by shaking or using the back of a spoon to bruise the surfaces (this creates crispiness). (2–3 minutes)
5. Toss potatoes with 30 ml olive oil, 6 g chopped rosemary, 6 g sea salt and 1 g black pepper so they are evenly coated. Place on the hot sheet pan in a single layer leaving space between pieces. (3 minutes)
6. Roast at 220°C for 25–35 minutes, turning once halfway through, until deeply golden and crisp. For 2–3 cm pieces roasted after parboil expect ~30 minutes. (30 minutes)
7. Transfer to a warm serving dish and hold for up to 15 minutes before serving (potatoes hold well up to ~15 minutes). (2 minutes)

Total cook time: ~45 minutes (12 parboil + 30 roast + handling).

Buttered Minted Peas

Not low-carb: peas.

Equipment

• 20 cm sauté pan with lid
• Spoon and small bowl
• Measuring spoons

Ingredients

• Frozen peas: 400 g
• Unsalted butter: 30 g
• Fresh mint leaves, finely chopped: 8 g
• Sea salt: 2 g
• Black pepper: 0.5 g
• Lemon juice (optional, table-side): 5 ml — do not cook with it; provide as optional table-side squeeze if desired.

Practical substitutions:

• If fresh mint unavailable, substitute 1 g dried mint rehydrated briefly (use sparingly).
• If frozen peas unavailable and fresh peas are in season, use 500 g fresh peas (shelled) and increase butter to 40 g.

Cooking / Baking

• Medium-high heat on stovetop
• Total cook time: 4–6 minutes active (finish-to-order; do not cook early)

Instructions

1. Bring the sauté pan to medium heat. Add 30 g unsalted butter and let it foam. (30 seconds)
2. Add 400 g frozen peas and 2 g sea salt; toss to coat in butter. Add 1–2 tablespoons water (15–30 ml), cover, and steam for 2 minutes until peas are hot and tender. (2 minutes)
3. Uncover, increase heat briefly to evaporate excess liquid, add 8 g chopped fresh mint and 0.5 g black pepper, toss and remove from heat. Keep warm and serve immediately. (1–2 minutes)

Total cook time: 4–6 minutes (finish within a few minutes of service).

3. LINEAR TIMELINE (16:00–17:00)

• 16:00: (Oven/Potatoes) Preheat oven to 220°C (200°C fan). Place rimmed baking sheet in oven. Fill a large pot with ~2.5 L cold water and set on high heat. (Start time)
• 16:05: (Potatoes) Add 1.2 kg cut potatoes to the now‑boiling water, add 12 g sea salt; start parboil timer for 10–12 minutes.
• 16:15: (Potatoes) Drain potatoes in a colander; return to pot or bowl and rough the surfaces with the back of a spoon for ~1–2 minutes.
• 16:18: (Potatoes) Toss potatoes with 30 ml olive oil, 6 g chopped rosemary, 6 g sea salt and 1 g black pepper; spread in a single layer on the preheated sheet pan and place in oven to roast for ~30 minutes (roast ends ~16:48).
• 16:20: (Steaks/Butter) While potatoes roast, make the mustard‑rosemary butter: mix 60 g butter, 20 g Dijon, 4 g chopped rosemary, 2 g sea salt and 1 g black pepper; form into a log and set aside at room temperature. (2–3 minutes)
• 16:30: (Potatoes) Halfway roast check: turn potatoes with a spatula to promote even browning; return to oven. (1–2 minutes)
• 16:40: (Prep) Remove steaks from refrigerator to come closer to room temperature; pat dry and season when ready. Turn oven to warm (or keep at 220°C with pan removed) to keep potatoes warm. Begin preheating grill pan over high heat (approx 6–7 minutes preheat).
• 16:46: (Potatoes) Remove potatoes from oven briefly, give final shake/toss if needed; return to oven to finish crisping (final roast time ~2 minutes), plan to remove at 16:48. (1–2 minutes)
• 16:48: (Potatoes) Remove sheet pan potatoes from oven and transfer to a warm shallow pan or serving dish; keep loosely tented. Potatoes are done and will hold up to ~15 minutes. (2 minutes)
• 16:49: (Grill pan) Ensure grill pan is very hot. Brush steaks with 10 ml olive oil and season with 8 g sea salt and 3 g black pepper.
• 16:50: (Steaks) Place steaks on very hot grill pan. Cook first side for 4 minutes (do not move). (4 minutes)
• 16:54: (Steaks) Flip steaks; cook second side for 3–4 minutes aiming for internal 57°C for medium. Begin heating the sauté pan for peas (medium heat) while steaks cook. (4 minutes)
• 16:58: (Steaks/Peas) Remove steaks from grill to a warm tray; top each with a 15 g slice of mustard-rosemary butter. Begin Buttered Minted Peas: add 30 g butter to sauté pan, add 400 g peas and 2 g salt, cover 1–2 minutes. (2 minutes)
• 17:00: (Plating & Serve) Uncover peas, stir in 8 g chopped mint, finish peas and transfer to serving bowl; plate steaks and potatoes, serve all at 17:00 exactly.

4. CONSOLIDATED SHOPPING LIST

Produce

• Potatoes: 1.2 kg
• Fresh rosemary: 10 g ⁺
• Fresh mint: 8 g
• Lemon (optional, table-side): 1 small (use 5 ml juice if used)

Meat / Seafood

• Beef sirloin steaks: 800 g (4 × 200 g)

Dairy

• Unsalted butter: 90 g ⁺

Dry Goods / Pantry

• Olive oil: 40 ml ⁺
• Dijon mustard: 20 g
• Frozen peas: 400 g
• Sea salt: 30 g ⁺
• Black pepper, whole or ground: 5 g ⁺

5. NOTES & ASSUMPTIONS

• Optional table-side items: extra Dijon mustard, extra sea salt, and lemon wedges (5 ml juice) may be offered at the table (optional, not part of the three-menu components).
• Global substitutions: If fresh rosemary or mint are unavailable, the recipes provide dried‑herb substitutions (use ~1/4 fresh weight for dried). If sirloin is unavailable, ribeye or rump steaks work as direct substitutes.
• Child-safety notes: keep kids away from the hot grill pan and oven. Use tongs and mitts; transfer steaks to a cool tray for slicing before serving to kids if desired.
• Timeline risk(s): The tightest window is the 10–15 minute finish where the steaks are grilled and the peas are finished simultaneously. Overrun on the grill will push serving time; ensure the grill pan is fully preheated and have the instant-read thermometer ready to avoid overcooking.
• Mitigation mindset: Preheat equipment fully, have all ingredients measured and at hand before starting (mise en place). Use a thermometer to hit the target internal temp quickly; if steaks finish early, tent loosely and plate potatoes immediately so nothing sits longer than ~15 minutes.
• Latest safe start time: You can start as late as 16:00 for a 17:00 serve. This plan uses the full 1-hour window.