Mix batter ingredients together in a pre-sprayed 8 X 8-inch baking dish. Beat eggs, milk, garlic salt and pepper together in a small bowl.
Top batter evenly with cheese slices, diced ham, egg mixture; sprinkle with shredded cheese.
Bake by placing in a COLD oven; set temperature to 350°F. Bake for 30 minutes or until done.