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Rump Steak and Parmesan Rosemary Roasties

Rump Steak and Parmesan Rosemary Roasties

with Creamy Mustard Sauce and Salad
4.5(1.5K)Review Summary
Recipe Development Team
Recipe Development TeamUpdated on March 30, 2026
Calories
633 kcal
Protein
44.9g protein
Total
40 minutes
Difficulty
Medium
Allergens:
  • Sulphites
  • Mustard
  • Milk
Produced in a facility that processes eggs, milk, fish, peanuts, sesame, shellfish, soy, tree nuts, and wheat.
serving amount

2 unit(s)

21 Day Aged British Rump Steaks

450 grams

Potatoes

125 grams

Baby Plum Tomatoes

2 unit(s)

Garlic Clove

1 sachet(s)

Dried Rosemary

12 grams

Red Wine Vinegar

(Contains: Sulphites)

17 grams

Wholegrain Mustard

(Contains: Mustard)

75 grams

Creme Fraiche

(Contains: Milk)

10 grams

Chicken Stock Paste

20 grams

Parmigiano Reggiano

(Contains: Milk)

40 grams

Wild Rocket

Not included in your delivery

1 tbsp

Plain Flour

½ tsp

Sugar for the Dressing

1 tbsp

Olive Oil for the Dressing

50 milliliter(s)

Water for the Sauce

Energy (kJ)2649 kJ
Energy (kcal)633 kcal
Fat27.2 g
of which saturates12.9 g
Carbohydrate55.1 g
of which sugars7.3 g
Protein44.9 g
Salt1.7 g
Always refer to the product label for the most accurate ingredient and allergen information.
Baking Tray
Kettle
Garlic Press
Colander
Large Saucepan
Small Bowl
Pan
Aluminum Foil

Instructions

Prep the Potatoes
1

Preheat your oven to 240°C/220°C fan/gas mark 7. Fill and boil your kettle.

Remove the steaks from the fridge to come up to room temperature before cooking.

Pour enough oil into a deep baking tray to cover the bottom and pop into the oven.

Peel the potatoes, then chop into 3cm chunks.

Start the Roasties
2

Pour the boiled water into a large saucepan on high heat with 1/2 tsp salt. Boil the potatoes for 5-6 mins or until the edges are soft.

Meanwhile, halve the baby plum tomatoes. Peel and grate the garlic (or use a garlic press).

Once the potatoes are ready, drain in a colander. Sprinkle on the flour (see pantry for amount), dried rosemary and season with salt. Shake to fluff up the potatoes.

Dress the Tomatoes
3

Take the hot baking tray out of your oven and carefully add the potatoes, turning in the oil. Roast on the top shelf until golden, 30-35 mins.

Meanwhile, in a small bowl, mix together the sugar and olive oil for the dressing (see pantry for both amounts) with the red wine vinegar and half the wholegrain mustard. Season with salt and pepper. 

Add the baby plum tomatoes to the dressing. Toss to coat and set aside.

Fry your Steaks
4

When the ptoatoes have 15 mins remaining, heat a drizzle of oil in a large frying pan on high heat. Season the steaks with salt and pepper. TIP: Rump steaks naturally vary in shape, so adjust the following timings depending on how you like yours cooked.

Once very hot, lay the steaks into the pan and fry until browned and medium-rare, about 5 mins. Turn halfway through. TIP: Cook each side for 1 min more if you like it more well done.

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 steaks. They're safe to eat when browned on the outside.

Mustard Sauce Time
5

Return the (now empty) pan to a medium-high heat, adding a drizzle more oil if needed (no need to clean).

Fry the garlic for 1 min, then stir in the creme fraiche, chicken stock paste, water for the sauce (see pantry for amount) and the remaining wholegrain mustard.

Bring to the boil, then lower the heat and simmer until thickened, 3-5 mins. Taste and season with salt and pepper if needed.

When the potatoes have 5 mins left, remove the tray from the oven and sprinkle over the Parmigiano Reggiano. Return to the oven and roast for the remaining time.

Finish and Serve
6

Just before you're ready to serve, toss the rocket through the tomatoes.

Slice your steaks widthways and serve with the parmesan roasties and salad alongisde.

Spoon the creamy mustard sauce over your steaks to finish.

Enjoy! 

Customer reviews

Review summary

Updated on Feb 2026
  • Flavour: Many enjoyed the delicious Parmesan rosemary roasties and creamy mustard sauce, though some found the sauce too strong.
  • Ease of prep: Several noted the recipe was easy to follow, but some felt it involved more steps and time than expected.
  • Suggestions: Consider cooking the steak on a griddle or in an air fryer for better results; adjust sauce quantity to taste.
  • Portions: Some felt the potato portion was too small for the number of servings; others wanted more salad variety.
  • Steak quality: Many found the steak tough or gristly; consider offering a different cut like sirloin for better tenderness.
AI-generated from customer reviews

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