In a large mixing bowl, combine the ground beef, almond flour, egg, Parmesan cheese, basil, minced garlic, oregano, onion powder, salt, and black pepper. Mix well with your hands until all ingredients are thoroughly combined.
Preheat your oven to 400°F (200°C).
Form the mixture into meatballs, about 1.5 inches in diameter. You should get about 12-14 meatballs.
In a large oven-safe skillet, heat the olive oil over medium heat. Once hot, add the meatballs, searing them for about 2-3 minutes on each side until browned.
After searing, carefully pour the marinara sauce over the meatballs, ensuring they are well-coated.
Transfer the skillet to the preheated oven and bake for 15-20 minutes, or until the meatballs are cooked through and reach an internal temperature of 160°F (70°C).
Remove from the oven and let rest for a few minutes before serving.
Notes
Serve with extra Parmesan cheese and fresh basil on top, alongside zucchini noodles for a complete meal.