Chili-Topped Sweet Potatoes

Cook beef, onion, bell pepper and garlic in a large skillet over medium-high heat, crumbling the beef with a spatula, until the meat is browned, 8 to 10 minutes. Stir in chili powder, cumin, oregano and coriander; cook, stirring, for 30 seconds. Add tomatoes (with their juice) and water and simmer for 5 minutes.

Meanwhile, prick sweet potatoes with a fork in several places. Microwave on High until tender all the way through, 12 to 15 minutes.

Serve the sweet potatoes topped with the chili and cheese.