01 -
In a large bowl, combine ground turkey, breadcrumbs, parmesan cheese, egg, parsley, minced garlic, onion powder, oregano, salt, and pepper. Mix gently until just combined—don't overmix, as this can make the meatballs tough.
02 -
Form the mixture into 1 1/2-inch meatballs (about 24 meatballs).
03 -
Heat olive oil in a large skillet over medium-high heat. Add the meatballs and cook until browned on all sides (they don't need to be cooked through). This step enhances flavor and ensures the meatballs maintain their shape in the crockpot.
04 -
Place the browned meatballs in the crockpot. Pour the marinara sauce and diced tomatoes over the top. Add basil, red pepper flakes (if using), garlic powder, salt, and pepper. Stir gently to coat the meatballs in the sauce.
05 -
Cover and cook on low for 6–7 hours or high for 3–4 hours, until the meatballs are fully cooked and the flavors have melded together.
06 -
Serve the meatballs and marinara sauce over spaghetti, zucchini noodles, or alongside crusty bread. Garnish with fresh parsley or additional parmesan cheese if desired.