In a large bowl, combine oat flour, baking powder, onion powder, garlic powder, and salt.
Stir in liquid egg whites and Greek yogurt until well incorporated.
Grease mini muffin tins and divide the dough evenly into 48 wells.
Shape the dough in each well to create pizza bite shapes.
Par-bake at 425°F (218°C) for 4-6 minutes.
Fill each well with marinara sauce, top with mozzarella cheese, and diced pepperoni.
Bake for an additional 6-10 minutes until cheese is melted and slightly browned.
Garnish with chopped parsley if desired.
Cool the pizza bites, then flash freeze them.
Vacuum seal the pizza bites using a vacuum sealer for long-term storage.
To reheat, air fry at 400°F (204°C) for about 5 minutes until crispy.
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