In a dutch oven or large pot, add ground beef. Cook until beef is no longer pink; drain and then return to pot.
Add tomato sauce, diced tomatoes, tomato paste, green pepper, garlic, cumin, chili powder, oregano, pepper, sugar, black beans, and sweet potatoes. Stir to combine.
Bring mixture to a boil, then cover and simmer for about 20 minutes.
Add pasta to mixture and stir to combine. Cook an addition 10 minutes over low heat.
Serve immediately with sour cream or shredded cheddar cheese, if desired.