Slimming World fillet steaks with mustard sauce

(50 ratings)
Fillet steaks in mustard sauce
Fillet steaks in mustard sauce
  • Serves: 4

  • Cooking time:

  • Skill level: Easy peasy

  • Costs: Mid-price

This mushroom, parsley and mustard sauce is great with fillet steaks and hasselback potatoes in this Slimming World recipe.


  • 596g (1lb 5oz) new potatoes, scrubbed
  • Low-calorie cooking spray
  • Tiny sprigs of rosemary
  • Sea salt

For the sauce

  • 2 shallots, peeled and chopped
  • 2tsp mustard powder
  • 340ml (12fl oz) beef stock
  • 1 level tbsp wholegrain mustard
  • 312g (11oz) mixed mushrooms (button, chestnut, shiitake), sliced
  • 6tbsp fatfree natural yogurt
  • Handful of fresh parsley, finely chopped
  • Salt and freshly ground black pepper

For the steaks

  • 4 lean beef fillet steaks
  • 2tbsp crushed mixed peppercorns
  • Wilted spinach, to serve

Remember that steak carries on cooking while it's resting so take it out 5 mins before you serve.


  1. Pre-heat the oven to 200C (gas mark 6). Cut small slices into each potato at regular intervals, making sure not to cut right through. Place the potatoes on a baking sheet and spray with low-calorie cooking spray. Tuck the rosemary sprigs into some of the slices. Sprinkle with sea salt and cook in the oven for 10 mins.
  2. Remove from the oven, turn the potatoes and cook for a further 30-40 mins, or until cooked through. Set aside and keep warm.
  3. Meanwhile make the sauce; place the shallots, mustard powder, stock and mustard into a small pan. Whisk to mix well and bring to the boil. Reduce the heat, add the mushrooms and simmer for 8-10 mins. Remove from the heat and stir in the yogurt and chopped parsley. Season well and keep warm.
  4. Season the steaks with the crushed peppercorns and some salt. Spray a non-stick frying pan with low-calorie cooking spray and place over a high heat. Cook the steaks for 5-6 mins on each side, or until cooked to your liking.
  5. Divide the potatoes and steaks between four warmed plates, drizzle over the sauce and serve with the wilted spinach.

For more delicious recipes or to find your nearest Slimming World group visit the Slimming World website

Your rating

Average rating

  • 4
(50 ratings)

Your comments

rich c

i can not cook but would love to cook it for my wife valentines day. need step by step instructions. thanks if anyone can spare time to write it down.

margaret johnson

very tasty and easy to make

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