"Create a recipe for Meatballs & Tomato Sauce, a savory main dish featuring classic meatballs paired with a tangy tomato sauce with a light herbal note. The recipe should include ground beef, ground pork, egg, panko breadcrumbs, pancetta, Parmesan cheese, garlic, parsley, tomato paste, olive oil, ground fennel, crushed tomatoes, basil, red pepper flakes, and kosher salt. The recipe should be balanced in protein and flavors, suitable for everyday meals or post-workout nutrition. The serving size is for 2 people."