Preheat oven to 350F. Lightly grease a 24-count mini muffin pan with cooking spray (or make 2 batches in a 12-count pan).
In a large bowl, add all ingredients except pizza sauce. Stir until all ingredients are mixed well.
Scoop mixture into each mini muffin cup; fill to the top of each.
Bake for 20-25 minutes. Let them cool in the pan for 10 minutes before removing.
Pack pizza sauce in a separate container in a lunch box for dipping.
