Potato Casserole

4 medium potatoes, sliced
1 cup milk
1 cup cream of mushroom soup
1/2 cup diced onion
1/2 cup diced green pepper
1 tsp. salt
1/2 tsp. pepper

Place sliced potatoes in greased baking dish. Combine remaining ingredients; pour over potatoes. Bake covered at 400 degrees for 35 minutes.