Preheat oven to 400° F. Place wire cooling rack over a parchment-paper or foil-lined baking sheet. Spray wire wrack with olive oil spray.
Place the breadcrumbs and 1 tablespoon of parmesan cheese in a shallow bowl or plate and stir to combine.
Next, add the chicken, cauliflower, mashed potato, remaining parmesan cheese, garlic powder, onion powder, paprika, salt (if using), and pepper in a food processor and blend until chicken is finely chopped and ingredients are combined.
With moistened hands, roll 1 tablespoon of chicken mixture between your palms and flatten it into a “nugget” shape.
Gently press nuggets into bread crumbs to evenly coat them.
Place nuggets on the greased cooling rack.
Lightly spray nuggets with olive oil spray.
Bake for 12-15 minutes or until golden, flipping after 10 minutes. If you prefer more golden brown nuggets, place them under the broiler for 2 minutes after cooking. Serve warm with your favorite dipping sauce.