Joy Bauers No Flub Meatball Sub

Name: Joy Bauer's No Flub Meatball Sub
Ingredients: 2 jar store-bought marinara sauce; 1 medium onion; 1 medium carrot; 2 clove garlic; ¾ c. grated Parmesan cheese; 1 tbsp. dried Italian seasoning blend; ¾ tsp. kosher salt; ¼ tsp. Black pepper; ¼ tsp. crushed red pepper flakes; 1¼ lb. ground turkey; 2 large egg whites; ¼ c. old-fashioned or quick-cooking oats