Saute onion and garlic in olive oil in a large skillet. Add ground meat and saute until browned, breaking up pieces.
Transfer to slow cooker. Add chipotle peppers, chili powder, smoked paprika, cumin, oregano, salt, tomato sauce, beans and water.
Cook on high for 4 hours or on low for 7-8 hours.
Use 2 chipotle peppers if you like a milder chili, or 4 peppers for a spicier chili.
Serve with your favorite toppings, such as chopped scallions, cilantro and shredded smoked Cheddar cheese.