Reuben with potatoes

3/4 cup cubed rye bread 2 (10 1/2 ounce) cans cream of mushroom soup 1 1/2 cups milk 1/2 cup finely chopped onion 3/4 lb deli sliced corned beef , chopped or[...]

4 large baking potatoes 2 cups finely diced cooked corned beef 1 (14 ounce) can sauerkraut , rinsed, well drained and finely chopped 1/2 cup shredded swiss[...]

5 cups baking potatoes , peeled and cubed 1/3 cup nonfat sour cream 1/4 cup skim milk 1/2 teaspoon salt 1/4 teaspoon pepper vegetable oil cooking spray 4 cups[...]