To a large Dutch oven or pot on the stove over medium-high heat, add the ground beef. Break it up with a spoon and cook until fully browned. Drain any excess grease.
Add the black beans, corn, diced tomatoes, tomato sauce, water, and taco seasoning. Stir well to combine.
Reduce heat to low and simmer for about 20 minutes, stirring occasionally so the flavors blend.
Serve warm with your favorite toppings like sour cream, cheese, avocado, or tortilla strips.
Notes
Store up to 4 days in the fridge or 2 months in the freezer. Reheat gently and top with your favorite taco toppings.