Scalloped Potato Casserole

Ingredients:
- 3 Tbsp. butter
- 2 Tbsp. all-purpose flour
- 3 c. milk
- 6 medium potatoes, pared and thinly sliced
- 1/2 tsp. black pepper
- 1 1/2 tsp. salt
- 2 Tbsp. chopped onion

Directions:
- Make white sauce with first 4 ingredients and pepper.
- Place half of potatoes in 2-quart casserole dish, cover with 1/2 of the onions and then 1/2 of the sauce.
- Repeat layers.
- Cover and bake at 350° about 1 hour.
- Uncover and bake 30 minutes longer.