Brown ground beef in a large skillet over medium-high heat for 5 minutes, breaking it apart as it cooks, then drain excess fat.
Stir in taco seasoning, black beans, and diced tomatoes with green chiles, then simmer for 3-4 minutes until heated through.
Warm tortillas in a separate skillet or over a gas flame for 30 seconds per side, then transfer beef mixture to bowls or serve in tortillas.
Top with shredded cheddar cheese, sour cream, and fresh cilantro and serve immediately.
Photo: Hermes Rivera / Unsplash