Warm olive oil in a skillet over medium heat. Incorporate the Italian sausage and onion
Sauté and stir until the sausage is browned, about 10 minutes. Transfer the sausage and onions to a slow cooker
Place the ground beef in the same skillet over medium heat and season with marjoram, 1 teaspoon of garlic powder, and Italian seasoning
Cook and stir for about 10 minutes, or until the meat is browned and crumbly. Fill the slow cooker with the ground meat
Add 2 teaspoons of garlic powder, and then the tomato sauce, chopped tomatoes, stewed tomatoes, and tomato paste
For eight hours, cook on low with a lid on. Add the sugar fifteen minutes before serving
