Pan-fried Sirloin Steak with Truffled Celeriac Fries & Black Pepper Sauce

Serving size

Prep in 10 High protein 1/3 daily fibre Low sat fat

Pan-fried Sirloin Steak with Truffled Celeriac Fries & Black Pepper 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 pepper 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 olive 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, cut the tomatoes into 2cm wedges. 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 olive 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 pepper sauce

  • Reheat the frying pan on medium heat. Add a generous pinch of freshly ground pepper and toast for 30 secs, then add the stock powder and 100ml water (50ml for 1 person). Bring to the boil and simmer for 1-2 mins, until reduced slightly
  • Remove the pan from the heat, then stir in the yoghurt. Season to taste

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 and salad alongside. Drizzle the steaks with the pepper sauce. Sprinkle with the remaining truffle zest

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