Heat olive oil in a skillet over medium-high heat; add onion and saute 3 minutes, then add garlic and saute for 30 more seconds; Add onions and garlic to crockpot
Brown beef in skillet; drain and add to crockpot
Add tomatoes, tomato sauce, water or beef broth, and seasonings. Stir, cook on low heat for 5 to 6 hours