Cook ground beef, onion, and garlic in a large skillet until meat is browned; drain off any fat.
Add black beans, undrained tomatoes, sweet pepper, water, and ground chipotle chile pepper to a 3 1/2- or 4-quart slow cooker. Stir in beef mixture. Cover and cook on low-heat setting for 4 to 5 hours or on high-heat setting for 2 to 2 1/2 hours. Serve topped with Lime Crema (see below) and chopped fresh mango.
Lime Crema: Stir together VOSKOS(R) Nonfat Honey Greek Yogurt, lime peel, and lime juice in a bowl. Serve immediately or chill up to 24 hours.