Au Gratin Potatoes

Au Gratin Potatoes

Serves 8

3½ pts per serving

1 tablespoon butter 

1 medium onion(s), thinly sliced 

2 level tbsp flour 

500 ml skimmed milk 

1000 g potato(es), thinly sliced 

125 g half-fat cheddar cheese, grated 

1 tsp salt 

1/4 tsp pepper

	Preheat oven to Gas Mark 5/190°C/375°F.
	Melt butter in a large casserole dish over medium heat. Add onion and cook, stirring occasionally, until onion begins to brown, about 5 minutes. Stir in flour; add milk slowly, stirring. Add potatoes; stir to mix. Bring to the boil. Stir in ¾ of cheese, salt and pepper.
	Level out surface. Transfer to oven and bake for 1 hour, uncovered. Cover and bake until potatoes are tender when tested with a fork, about 20 minutes more.
	Preheat grill. Sprinkle remaining cheese over potatoes. Grill until the cheese is golden brown, about 1 to 2 minutes. Cool for 5 minutes before slicing into 8 pieces