Step 1

In a large pot, heat the oil over medium-high heat. Add the onion and saute for 4 minutes. Add in the ground beef and sausage; breaking it up with your spoon as it cooks, until browned (8 to 10 minutes). Spoon out some of the excess fat; discard. Leave a few tablespoons in for flavor.

Step 2

Stir in the garlic. Then stir in the tomatoes, tomato paste, broth, seasonings, sugar and red pepper flakes (if using). When the mixture begins to bubble, reduce the heat, cover the pot loosely with a lid. Simmer for 30 minutes to 1 hour. The longer you cook it, the more flavorful it becomes. Stir occasionally, and adjust heat as needed to maintain a low simmer. Thin with additional beef broth, if needed.

Step 3

Add salt and pepper, to taste. Serve over pasta.