Brown pork sausage in skillet on stove top over medium heat.
Once sausage is about halfway done cooking, add onions to the pan and continue to cook until meat is fully browned and onions are soft.
Add garlic and cook for 2 more minutes, stirring regularly.
Pour in tomatoes, tomato paste, tomato sauce, beef broth, sugar, crushed red pepper, and ground pepper. Cover and simmer for 15 minutes.
Finely chop the basil leaves and mix it into the sauce. Cover and simmer for 10 more minutes.
Ladle over spaghetti noodles and enjoy!