In a large mixing bowl, combine meatloaf ingredients. Mix until just combined.
2 # ground chicken, 1/2 cup yellow onion, 1/2 cup quick cooking oats, 1/2 cup breadcrumbs, 1/4 cup grated parmesan cheese, 2 eggs, 1/2 cup ketchup, 2 tbsp. Worcestershire sauce, 1 tbsp. dried parsley, 1 tsp. dried oregano, 1 tsp. garlic powder, 1 tsp. salt, 1/2 tsp black pepper