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Matured Sirloin Steak & Béarnaise Butter

Matured Sirloin Steak & Béarnaise Butter

with Herby Roasties and Tenderstem®
4.5(132)
Recipe Development Team
Recipe Development TeamUpdated on March 05, 2026
Calories
625 kcal
Protein
45g protein
Total
35 minutes
Difficulty
Medium
Produced in a facility that processes eggs, milk, fish, peanuts, sesame, shellfish, soy, tree nuts, and wheat.
serving amount

½

Tarragon

150

Tenderstem® Broccoli

1

Echalion Shallot

1

Garlic Clove

2

21 Day Aged British Sirloin Steaks

½

Flat Leaf Parsley

30

Unsalted Butter

½

Dried Oregano

450

Potatoes

Energy (kcal)625 kcal
Energy (kJ)2615 kJ
Fat31 g
of which saturates16 g
Carbohydrate44 g
of which sugars2 g
Protein45 g
Salt0.3 g
Always refer to the product label for the most accurate ingredient and allergen information.
Chopping Board
Baking Tray
Knife
Bowl
Medium Saucepan
Grill Pan
Plate

Instructions

Roast the Potato
1

Preheat your oven to 200°C. Take the steaks out of the fridge and pop onto a plate to come up to room temperature. Chop the potatoes into 2cm chunks (no need to peel!). Pop the potatoes on a large baking tray in a single layer. Drizzle with oil, and sprinkle on the dried oregano. Season with salt and pepper. Toss to coat in the oil, then roast on the top shelf of your oven until golden, 25-30 mins. Turn halfway through cooking.

Prep
2

Halve, peel and chop the shallot into small pieces. Peel and grate the garlic (or use a garlic press). Finely chop the flat leaf parsley (stalks and all). Pick the tarragon leaves from their stalks and roughly chop (discard the stalks).

Make the Butter
3

Heat a splash of oil in a small saucepan over medium-high heat. Add the shallot and cook, stirring until softened, 3-4 mins. Add the garlic and cook for a minute more then transfer to a bowl. Allow to cool, then add the butter and use a spoon to mash the butter and shallots together. Next, mix in the parsley and tarragon. Bearnaise butter made! Put a saucepan of water onto boil. We will use it for the broccoli later.

Cook the Steak
4

When the potatoes have 10 mins left, put a frying pan on high heat with a drizzle of oil. Season the steaks with salt and pepper. When the oil is hot, lay the steaks in the pan and brown for a minute on each side. Once browned, lower the heat slightly and cook for another 1-2 mins on each side. TIP: This will cook the steak to medium rare - if you like yours less rare just cook for 1-2 mins more.

Cook the Tenderstem
5

When the steaks are cooked, pop them on to a plate. Spread the butter on top and cover loosely with foil, leave to rest for a couple of mins. When the water is boiling add the tenderstem broccoli along 0.25 tsp of salt and cook until tender, 2-3 mins. Drain in a colander and get ready to serve.

Serve
6

Share the potatoes between your plates and serve the steaks and tenderstem alongside. Drizzle any melted buttery juices over the steak and enjoy!

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