2 tbsp. butter
2 tbsp. flour
3 tbsp. chopped onion
2 c. milk
2 c. (6 oz.) Cheddar cheese
1/2 tsp. pepper
6 med. potatoes

Peel potatoes and slice into 1/8 inch slices. Melt butter, add flour and onion. Cook and stir over low heat until bubbly. Gradually mix in milk and 1 1/2 cups of the cheese. Cook and stir over low heat until thickened, add pepper.

Line a buttered baking dish with potatoes. Pour cheese mixture over potatoes. Sprinkle remaining 1/2 cup cheese on top. Bake 45-55 minutes at 350 degrees. Serve hot.