Sauté ground beef at medium heat with the onion, butter and olive oil, breaking it up with a spatula. When the meat is brown add the tomato sauce, paste, and diced tomatoes. Add the garlic, pepper, salt, brown sugar, and oregano. Cover with a lid and simmer on low for ½ hour. Check and stir frequently – if it becomes dry, add ¼ cup water.
Cook pasta in a pot with ½ tsp salt and 1 Tbsp olive oil to keep pasta from sticking.