Preheat your oven to 375°F (190°C) and line a baking sheet with parchment paper.
In a bowl, combine the cooked red lentils, rolled oats, one whole egg, and one egg white. Mash lightly with a fork to form a coarse mixture.
Stir in the finely chopped onion, minced garlic, Italian seasoning, salt, and pepper.
Form the mixture into evenly sized meatballs (about 12-15 meatballs, depending on your preferred size) and place them on the prepared baking sheet.
Bake the lentil meatballs in the preheated oven for 20-25 minutes, turning halfway through to ensure even baking.
While the meatballs bake, prepare the zucchini noodles using a spiralizer if not pre-spiralized. Place them in a bowl and optionally season lightly with salt and pepper.
Heat the tomato sauce in a small saucepan over medium heat until warmed through.
To serve, plate the zucchini noodles, top with the baked lentil meatballs, and drizzle with the warm tomato sauce.
Enjoy this hearty yet light dish that perfectly balances protein, fiber, and fresh flavors.