SCALLOPED POTATO BAKE

8 cups thinly sliced pared potatoes
1/4 cup finely chopped onion
1 10 1/2-ounce can condensed cream of mushroom soup
1 10 1/2ounce can condensed cream of celery soup
1 cup milk
3/4 t salt
pepper

OVEN 350

Spread 4 cups sliced potatoes in bottom of greased 12x71/2x2-inch baking dish. Combine remaining ingredients, salt, and dash pepper; pour half the mixture over potatoes. Repeat layers. Cover; bake at 350 for 1 hour. Uncover and bake 30 to 45 minutes longer. Serves 8.