Precook pasta and set aside.
Add oil to hot pot. Sauté onion and garlic until softened.
Blend tomatoes until smooth.
Add tomato puree, red pepper puree, salt, and broth to pot.
Add parmesan rind to pot and simmer for 30 minutes. (remove rind before serving)
Add noodles to a bowl and serve with a ladle or two of broth.
Top with a few meatballs and a sprinkle of fresh ground pepper and parmesan.