In a large bowl, add eggs, breadcrumbs, mozzarella cheese and parmesan cheese, garlic, chicken stock, onion powder and black pepper. Mix well with your hands, until all combined.
Form riced veggie medley mixture into nuggets, using a cookie scoop. Repeat for each. Transfer on a baking pan with parchment paper, spray top lightly with cooking spray.
Place in oven for 15-20 minutes at 375 degrees, and flip for an additional 3 minutes, until cooked and golden brown. Let cool and ready to serve with your favourite dipping sauce.