- butter - 25g (1 oz),
- vegetable oil - 1 tbsp
- potatoes - 450g (1 lb) peeled and thinly sliced,
- onions - 2 medium thinly sliced,
- Cheddar or Lancashire Cheese - 110g (4 oz) grated.
3. Uncover and brown the top of the dish under a hot grill. Serve straight from the pan.