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21 Day Aged Sirloin Steak in Garlic & Chive Butter

21 Day Aged Sirloin Steak in Garlic & Chive Butter

with Cheesy Bacon Hasselback Jersey Royals and Tomato Salad
Lily Stevens
Lily StevensUpdated on May 13, 2026
Calories
847 kcal
Protein
52.1g protein
Total
50 minutes
Difficulty
Medium
Allergens:
  • Milk
  • Sulphites
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 Sirloin Steaks

30 grams

Unsalted Butter

(Contains: Milk)

400 grams

Jersey Royal Potatoes

2 unit(s)

Garlic Clove

30 grams

Mature Cheddar Cheese

(Contains: Milk)

1 bunch(es)

Chives

60 grams

British Smoked Bacon Lardons

125 grams

Baby Plum Tomatoes

12 milliliter(s)

Balsamic Vinegar

(Contains: Sulphites)

50 grams

Baby Leaf Mix

Not included in your delivery

1 tbsp

Olive Oil for the Dressing

Energy (kJ)3544 kJ
Energy (kcal)847 kcal
Fat52.2 g
of which saturates24.7 g
Carbohydrate35.2 g
of which sugars5.6 g
Dietary Fibre5.1 g
Protein52.1 g
Salt1.7 g
Trans Fat0.1 g
Potassium765.3 mg
Calcium132.9 mg
Iron1.3 mg
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.
Baking Tray
Grater
Aluminum Foil
Small Bowl
Pan

Instructions

Hasselback Time
1

Preheat your oven to 220°C/200°C fan/gas mark 7. Remove the steaks and butter from your fridge to allow them to come up to room temperature.

Place a few Jersey Royal potatoes at a time in between two wooden spoon handles on a board. Make slices widthways at 3mm intervals, making sure not to cut the whole way through. Repeat with the remaining potatoes.

Put the potatoes onto a large baking tray. Drizzle with oil, season with salt and pepper, then toss to coat. Spread out in a single layer.

When the oven is hot, roast on the top shelf until golden and tender, 35-40 mins.

Roast the Garlic
2

Meanwhile, pop the garlic cloves (unpeeled) into a small piece of foil with a drizzle of oil and scrunch to enclose it.

Roast the parcel on the middle shelf of your oven until soft, 10-12 mins. 

In the meantime, grate the cheese. Finely chop the chives (use scissors if easier).

Make your Garlic Butter
3

In a small bowl, combine the butter and chives.

Once the roasted garlic has cooled, cut the end with scissors, squeeze it out of the skin and mash with a fork, then stir it into the chive butter. Season with salt and pepper.

When the potatoes have 10 mins remaining, sprinkle the bacon lardons and cheese over the potatoes and return to the oven for the remaining time. IMPORTANT: Wash your hands and equipment after handling raw meat. Cook bacon thoroughly.

Fry the Steaks
4

Heat a drizzle of oil in a large frying pan on high heat. Season the steaks with salt and pepper.

Once hot, lay the steaks into the pan and fry until browned, 1 min on each side.

Lower the heat slightly and cook for another 1-2 mins on each side if you want them medium-rare. TIP: Cook for 1-2 mins more if you like it more well done.

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

Dress to Impress
5

While the steaks rest, halve the baby plum tomatoes.

In a medium bowl, combine the balsamic vinegar and olive oil for the dressing (see pantry for amount). Stir the tomatoes through the dressing. Season with salt and pepper.

Just before everything's ready, add the baby leaves to the bowl of tomatoes and toss to coat in the dressing.

Serve
6

When everything's ready, transfer your steaks to your serving plates. Spoon over any melted butter from the resting place.

Serve the cheesy bacon hasselback Jersey Royals and the tomato and baby leaf salad alongside.

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