Scalloped Potatoes

4 cups thinly sliced potatoes
1/2 cup onion, chopped
4 tbs butter
3 tbs flour
1 and 1/2 cup milk
1 tsp salt
1 dash cayenne pepper
1 and 1/2 cups grated cheese, separated
paprika

Preheat oven to 350 degrees.

1. Melt 1 tbs butter and saute onion.
2. Add rest of butter, add flour, and stir well. Let sit for a minute.
3. Add milk, stirring constantly.
4. Add salt and cayenne. Cook until boiling. Reduce heat and stir in 1 cup cheese.
5. In a 2 qt dish, layer potatoes and cheese sauce. Top with remaining cheese and paprika.
6. Bake for 1 hour.