Place sweet potatoes, tomatoes, tomato sauce, water, and all seasonings in a slow cooker on high for 2 hours, stirring occasionally.
Brown beef in a large skillet over medium-high heat. Drain and discard any excess grease.
Add cooked ground beef, black beans, and corn to the slow cooker.
Cook an additional 1-2 hours, until flavors have blended together. Serve warm.