These beef meatballs in marinara sauce are a crowd-pleasing dish. To make the meatballs, combine ground beef with breadcrumbs, Parmesan cheese, egg, garlic, and herbs. Shape the mixture into small balls and bake in the oven until cooked through. In a separate pan, simmer marinara sauce with onions, garlic, and herbs. Add the cooked meatballs to the sauce and let them simmer for a few minutes to absorb the flavors. Serve over pasta or as a sandwich filling for a delicious meal.