Ham and Potato Casserole

½ bag frozen diced or shredded potatoes
1 can (10 ¾ oz.) cond. cream chicken soup
1/2 soup can milk
1 cup sour cream
1 cup sharp cheddar cheese, grated
1/4 cup grated onion (optional)
salt and pepper to taste
3 tablespoons butter, melted
3/4 cup potato chips
1 cup ham or leftover pork roast

Place potatoes and pork in a 2-3 quart casserole dish or a 9x13 cake pan.
Combine soup, milk, sour cream, cheese, and onion and salt and pepper to taste. If a saucier dish is desired, add 2-3 tablespoons additional milk. Mix well. Spread sauce over potatoes. Melt butter and combine with potato chips. Sprinkle over casserole. Bake uncovered at 350 F for 30-45 minutes or until hot and bubbly throughout.