Makes 24 ShellsReady In: 1 hourPrep Time: 20 MinutesThe sauce 2 lbs. Roman tomatoes, quartered 2 lbs. Campari or cherry tomatoes, quartered or halved 3 cups onion, chopped 4 garlic cloves, smashed ½ cup extra virgin olive oil 2 tsp. red pepper flakes or to taste 1...