You can substitute really about anything in these. I make them for dinner and serve with muffins and fruit:
7 eggs, beat
2/3 cups milk
chopped ham (I buy the kind already cubed at the store)
shredded cheddar cheese
Pillsbury refrigerated pie crust
Using a glass, cut out crust to fit regular size muffin pan (makes 12). Add ham and cheese over each crust. Mix together the eggs and milk and pour over the top. Bake 20 minutes at 400 degrees.