Combine mince, onion, garlic powder, cumin, mixed herbs, rosemary, salt and pepper in a bowl.
Roll meatballs into 24 tablespoon size balls and place into a large baking dish. Pour the sauce over the meatballs and sprinkle with the cheeses.
Bake for 40 minutes until meatballs are cooked and cheese is melted and golden. Serve with a tossed green side salad.