I'm always looking for a new, EASY appetizer to take to different parties. This one is very simple and yummy! I haven't tried doing it yet, but I think you could use Bisquick instead of the flour and baking powder.
Pre-heat over to 375*. Grease a 24 cup mini-muffin pan (or 2 12 cup mini-muffin pans). In a large bowl, whisk together the flour, garlic powder and baking powder; whisk in the milk and egg. Stir in the mozzarella, sausage and pepperoni; let stand for 10 minutes.
Stir the batter and divide among the mini-muffin cups. Bake until puffed and golden; about 20-25 minutes.
Meanwhile, microwave the pizza sauce until warmed. Serve the puffs with the pizza sauce for dipping.