Heat the oven to 350 F. In a small saucepan, saute the onions and garlic until tender, about 5 to 7 minutes. Remove from heat. In a medium bowl, combine the onions, cheese, parsley, garlic, egg substitute, salt and pepper; mix well. Add the beef; gently mix with hands until just combined. Form mixture into 1-inch meatballs — about 3/4 ounces each. Place on a baking sheet and bake for 10 to 15 minutes or until meatballs reach an internal temperature of 160 F.