Heat the olive oil in a large skillet. Add the onion and cook, just until translucent. Add the garlic and cook until fragrant, about 30 seconds. 1/2 tablespoon extra virgin olive oil, 1/2 large onion, 2 cloves garlic Add the ground beef and cook, breaking it up as it cooks, util it is browned and cooked through. 1 pound ground beef Place the pinto beans, kidney beans, tomato sauce, and diced tomatoes in a large slow cooker. Stir in the chili powder, oregano, cumin and garlic powder.