2 pounds potatoes (about 6 medium)
1/4 cup finely chopped ham
3 tablespoons flour
1 tsp. salt
1/2 tsp. pepper
1/2 cube butter
3 cups milk
1 1/2 cup grated cheese

Heat oven to 350°F. Peel and slice potatoes thin. Put in 4 quart greased casserole dish with onion and ham in layer. Mix flour, milk, salt and pepper. (Put in a jar and shake. Make sure there are no lumps.) Pour over potatoes. DOT with butter. Cover and bake 60 to 70 minutes until done. Uncover and bake 15 minutes. Then put cheese on top and bake uncovered until cheese is melted and bubbly.