Cheesy mustard mash

• Maris Piper potato↗1kg kg

  cut into large chunks

• low-fat crème fraîche↗4 tbsp tbsp
• very strong cheddar↗50g g

  grated

• wholegrain mustard↗2 tbsp tbsp
• thyme leaf↗1 tbsp tbsp

Step-by-step instructions

1. 1

   Boil the potatoes in salted water for 20 mins or until tender, then drain.

2. 2

   Heat the grill to high. Mash the potatoes until smooth, then beat in the crème fraîche and half the cheese. Season to taste, then spoon the hot mash into a medium baking dish and smooth the top.

3. 3

   Mix together the rest of the cheese, the mustard and thyme leaves. Spread over the mash with a spatula or the back of a spoon. Grill until the cheese is melting and golden, then serve with the beef.