Brown ground sausage in a large skillet over medium-high heat, breaking it into small pieces as it cooks, about 6 minutes.
Drain excess fat, then add drained black beans, tomatoes with green chiles, and cumin, stirring well.
Simmer for 8 minutes until flavors meld, then remove from heat and stir in chopped fresh cilantro and lime juice.
Serve hot as-is or with warm flour tortillas and your favorite toppings.