Preparation
Preheat the oven to 375°F.
Bring a large pot of water to a boil over high heat. Once the water comes to a boil, add a generous handful of salt. Cook the pasta just short of al dente. Drain and return to the pot.
Preheat a medium skillet over medium heat. Add EVOO, onions, garlic and red pepper flakes. Cook, stirring frequently, for about 5 minutes. Add the beef stock and both cans of crushed tomatoes, and bring to a bubble. Chop or crumble up leftover meatloaf and add to the sauce. Simmer for 3-4 minutes. Season with salt and pepper to taste.
