Ost- och senapspotatis

👩‍🍳 Gör så här

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.