Preheat your oven to 400°F and line a baking sheet with parchment paper.
In a mixing bowl, combine the lean ground turkey, egg, almond flour, garlic powder, onion powder, salt, and pepper. Mix until just combined to form a cohesive mixture.
Using your hands, form the mixture into small meatballs, about the size of a golf ball, and place them on the prepared baking sheet.
Bake the meatballs for 15-18 minutes, or until they are fully cooked and lightly browned.
While the meatballs bake, use a spiralizer or vegetable peeler to create zucchini noodles from the medium zucchini.
Heat a teaspoon of olive oil in a pan over medium heat and lightly sauté the zucchini noodles for 2-3 minutes until just tender. Avoid overcooking to maintain their crisp texture.
Warm the marinara sauce in a small pot or microwave, as desired.
Plate the zucchini noodles, top with the baked turkey meatballs, and drizzle with warmed marinara sauce. Serve immediately.