Pan-fried Sirloin Steak with Truffled Celeriac Fries & Peppercorn Sauce

Serving size

Prep in 10 High protein 1/3 daily fibre

Pan-fried Sirloin Steak with Truffled Celeriac Fries & Peppercorn Sauce

Prep time: 0 mins
Total time: 40 mins
Cuisine: British
Food group: Beef

It's a classic steak frites, but with a Mindful Chef twist. Sirloin steaks from tender British beef are sizzled till golden and juicy. Crispy celeriac fries are tossed in umami truffle zest. For a luxurious finish, pour silky-smooth peppercorn sauce on top. On the side? A rocket tomato salad, for extra freshness.

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 large frying pan, a medium bowl, a measuring jug & a peeler

Make the celeriac fries

  • Remove the steaks from the fridge and allow to come to room temperature. Season both sides with salt and pepper
  • Peel the celeriac and cut into fries. Place the fries onto the lined baking tray and toss with 2 tsp oil and a pinch of salt and pepper
  • Roast for 25-30 mins, turning once, until soft and golden. Once cooked, toss with half the truffle zest

Build the salad

  • Meanwhile, halve the tomatoes. Peel and thinly slice the shallot into rings
  • Add the tomatoes and shallot to the medium bowl, along with the vinegar and 1 tsp olive oil. Season with salt and pepper and toss to combine

Sizzle the steaks

  • Heat the large frying pan with 1 tbsp 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 leave to rest

Make the peppercorn sauce

  • Add the yoghurt, stock powder, a generous pinch of freshly ground pepper and 100ml hot water (50ml for 1 person) to the empty steak pan. Bring to a boil and simmer for 1-2 mins, until the sauce thickens

Finish & plate up

  • Add the rocket to the tomato and shallot salad and toss to coat. Slice the steaks against the grain
  • Share the steaks between plates, with the celeriac fries, salad alongside. Drizzle the steaks with the peppercorn sauce. Sprinkle with the remaining truffle zest

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