Creamy Crunchy Ham Onion Frittata

Description
This recipe came from an estate sale. I obtained it when I purchased the family collection from the Steep Estate in Elmo, Texas in 1989.
 * Contributed by Catsrecipes Y-Group

Ingredients

 * 2 tablespoons margarine
 * 5 eggs slightly beaten
 * ¼ cup milk
 * 8 ounce jar Cheez Whiz
 * 1 cup chopped cooked potatoes
 * 1 cup chopped ham
 * 1 can French fried onions

Directions

 * 1) Melt margarine in ovenproof skillet over low heat.
 * 2) Gradually add eggs and milk to cheese spread and mix well then stir in potatoes, ham and ½ of onions.
 * 3) Pour into skillet and bake at 350°F for 20 minutes.
 * 4) Top with remaining onions and continue baking 5 minutes.