Preheat your oven to 400°F (200°C) and line a baking sheet with parchment paper.
In a large mixing bowl, combine the cooked quinoa, grated zucchini, and cooked lentils. Mix well.
Add the breadcrumbs, grated Parmesan cheese, garlic powder, oregano, smoked paprika, salt, and pepper to the mixture. Stir until all ingredients are evenly incorporated.
In a small bowl, beat the egg (or prepare the flax egg by mixing 1 tablespoon of ground flaxseed with 2.5 tablespoons of water and letting it sit for 5 minutes). Add it to the vegetable mixture.
Stir in the chopped parsley until evenly distributed.
Using your hands, form the mixture into small balls, about 1-1.5 inches in diameter. Place them on the prepared baking sheet.
Drizzle or brush olive oil over the veggie meatballs.
Bake in the preheated oven for 25-30 minutes, flipping halfway through, until golden brown and crispy on the outside.
Serve with marinara sauce, on a bed of spaghetti or as part of a hearty veggie sandwich.
Notes
For a vegan option, use a flax egg instead of a regular egg.