Ingredients: (Serves 4)  
500g/1 lb 2oz potatoes, peeled and chopped
800g/1 lb 12oz broccoli, cut into florets
2 eggs, separated
100g/3½ oz grated cheddar
4 tbsp crème fraîche
Salt, pepper
A few slices of butter

Method:
1. Put the potatoes and broccoli in a large pan, cover with boiling water and cook until tender. Drain and mash.
2. Season well with salt and pepper, then stir in the egg yolks, crème fraîche and half of the cheddar.
3. Beat the egg whites until firm and gently stir in to the mixture.
4. Preheat the oven to 220°C/fan 200°C and lightly grease 4 shallow ovenproof dishes (or one large).
5. Divide the mixture between the dishes and level the surface.
6. Put a few slices of butter on top, sprinkle with the remaining cheese and bake for 20-25 mins until golden.