Sirloin Medallion Steak with Truffle Chips, Roast Sumac Greens & Chive Sauce

Sirloin Medallion Steak with Truffle Chips, Roast Sumac Greens & Chive Sauce

Celebrate Father's Day in style with this restaurant-worthy steak dinner. Sizzle tender Sirloin medallion steaks until juicy. On the side? Golden potato chips, tossed in decadent truffle powder, and vibrant roast Tenderstem broccoli and crunchy sugar snap peas, infused with fragrant sumac. Finish with a drizzle of creamy chive and shallot sauce for a true showstopper.

High protein 1/3 daily fibre New Low sat fat Father's Day

Serving size

Cook time: 35 mins
Cuisine: British
Food group: Beef
Allergens: Mustard, Eggs, Milk

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Cooking Instructions

The protein cooking time listed in this recipe has been updated.

As of December 2025, we’ve revised cooking times for all our proteins to reflect improved food safety guidance.

Check out the latest recommended times in our Cooking Guidelines.

Before you start

  • Preheat the oven to 240C / fan 220C / gas mark 9
  • Line a baking tray with parchment paper
  • Pull out a medium frying pan, a measuring jug & a grater

Get started

  • Remove the steaks from the fridge and allow to come to room temperature. Season both sides with salt and pepper
  • Cut the potatoes into chips, then place onto a lined baking tray and toss with 1 tsp oil, salt and pepper. Roast for 15-20 mins
  • Trim the broccoli. Finely dice the shallot. Finely chop the chives. Finely grate the cheese

Sizzle the steak

  • Heat the medium frying pan with 1 tsp oil on medium-high heat. Once hot, add the steaks and cook (as a guide: cook for 2-3 mins on each side for medium-rare, or 5-7 mins for well done). Quickly sear the edges of the steaks, then cover to keep warm and leave to rest

Roast the greens

  • After 15-20 mins, move the potato to one side of the tray and add the broccoli and sugar snaps to the other. Drizzle with 1/2 tsp oil and a pinch of salt and pepper. Roast for a further 10 mins, until soft and golden

Sauce time

  • Reheat the medium frying pan with 1/2 tsp oil on medium heat. Once hot, add the shallot and a pinch of salt and cook for 3-4 mins, until softening
  • Add half the vinegar and cook for 30 secs, then stir in the stock, half the cheese and 150ml water (75ml for 1 person). Simmer for 2-3 mins, until thickened
  • Stir in the mustard and half the chives. Season to taste with salt and pepper. Add a splash of water if it's too thick

Finish & plate up

  • When ready, toss the greens with the sumac, remaining vinegar and remaining chives
  • Slice the steaks against the grain
  • Share the steaks between plates, drizzled with the sauce. Serve the greens and chips alongside. Sprinkle the truffle zest (use less for a milder flavour) and the remaining cheese over the chips to finish

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