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Rosemary Rump Steak in Creamy Leek Sauce

Rosemary Rump Steak in Creamy Leek Sauce

with Mustard Butter Peas and Potatoes
Recipe Development Team
Recipe Development TeamUpdated on August 17, 2026
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Calories
669 kcal
Protein
38.6g protein
Total
25 minutes
Difficulty
Medium
Allergens:
  • Milk
  • Mustard

This Baked Rosemary Chicken in White Wine & Leek Sauce can be on your table in less than 25 minutes. An easy and creamy leek sauce brings extra flavour and is a deliciously simple way to elevate your dinner and try something new.

Produced in a facility that processes eggs, milk, fish, peanuts, sesame, shellfish, soy, tree nuts, and wheat.
serving amount

250 grams

21 Day Aged British Rump Steaks

350 grams

Salad Potatoes

1 sachet(s)

Dried Rosemary

1 unit(s)

Leek

10 grams

Chicken Stock Paste

2 unit(s)

Garlic Clove

75 grams

Creme Fraiche

(Contains: Milk)

120 grams

Peas

10 grams

Wholegrain Mustard

(Contains: Mustard)

Not included in your delivery

125 milliliter(s)

Water for the Sauce

20 grams

Butter

1 tbsp

Honey

Energy (kJ)2797 kJ
Energy (kcal)669 kcal
Fat34.9 g
of which saturates18.5 g
Carbohydrate55.4 g
of which sugars16.6 g
Dietary Fibre10.7 g
Protein38.6 g
Salt1.7 g
Due to the different suppliers we purchase our products from, nutritional facts per meal can vary from the website to what is received in the delivered box, depending on your region.
Medium Saucepan
Kettle
Baking Tray
Pan
Garlic Press
Aluminum Foil
Colander

Cooking Steps

Get Started
1

a) Preheat your oven to 240°C/220°C fan/gas mark 9. Remove the steaks from your fridge to allow them to come up to room temperature.

b) Boil a full kettle. 

c) Fill a large saucepan with the boiling water from your kettle and return to the boil with ½ tsp salt.

d) Quarter the salad potatoes (no need to peel) and add to the pan. Cook until tender, 12-15 mins. 

Finish the Prep
2

a) Meanwhile, trim the root and dark green leafy part from the leek and discard. Halve lengthways, then thinly slice.

b) Peel and grate the garlic (or use a garlic press).

c) Heat a drizzle of oil in a large frying pan on high heat. Season the steaks with salt and pepper and sprinkle over the dried rosemary.

d) Once very hot, lay the steaks into the pan and fry until browned and medium-rare, about 6-8 mins depending on their thickness. Turn halfway through. TIP: Cook each side for 1 min more if you like it more well done. 

Fry the Leek
3

a) Once cooked, transfer to a board, cover with foil and allow to rest for a couple of mins. IMPORTANT: Wash your hands and equipment after handling raw meat. The steak is safe to eat when browned on the outside.

b) Return the (now empty) frying pan to medium heat. Add a drizzle of oil if the pan is dry.

c) Once hot, add the leek and season with salt and pepper. Cook the leek until softened, 4-6 mins, stirring occasionally.

d) Once the leek has softened, add the garlic and fry for 1 min more.

Finish the Sauce
4

a) Next, stir in the water for the sauce (see pantry for amount) and white wine stock powder. Bring to the boil, then lower the heat and simmer until slightly reduced, 1-2 mins.

b) Mix in the creme fraiche, then remove from the heat. Taste and season with salt and pepper if you feel it needs it. Add a splash of water if the sauce looks a little thick.

c) Once the potatoes are cooked, add the peas to the saucepan and cook for 1 min more. Drain well in a colander and return to the pan, off the heat. Cover with the lid to keep warm.

Finish Up
5

a) Season the cooked peas and potatoes with salt and pepper

b) Stir the wholegrain mustard (add less if you'd prefer) and butter (see pantry for amount) into the potatoes.

c) When everything's nearly ready, thinly slice the steaks widthways and drizzle over the honey (see pantry for amount) and turn to coat.

Serve
6

a) Transfer the steaks to your plates.

b) Spoon the white wine and leek sauce over the steaks.

c) Serve the peas and potatoes alongside.

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