Cook the ground beef and onion in a skillet over medium-high heat breaking apart the meat with a spoon until the beef is cooked through.
1 pound lean ground beef, ½ yellow onion
Add in the bell pepper and cook until it begins to soften, 1-2 minutes. Add in the garlic, taco seasoning, cumin, and salt and cook until fragrant, about 1 minute.
1 red bell pepper, 2 cloves garlic, 1 tablespoon taco seasoning, 1 tablespoon ground cumin, ¾ teaspoon kosher salt
Stir in the salsa, black beans, and half of the cheese. Sprinkle the remaining cheese over the top. Lower the heat to medium, cover, and cook until the cheese has melted, about 2 minutes. Garnish with chopped parsley and sliced jalapeno pepper (if desired) and serve.
15 ounces salsa, 15 ounces black beans, 1 cup freshly shredded cheddar cheese, 1 cup freshly shredded Monterey jack cheese, 2 tablespoons chopped fresh cilantro, 1 jalapeno pepper