Step 1: Prep the Vegetables and Tortillas - Start by dicing the onion and bell pepper into small pieces so they cook evenly. Then cut your corn tortillas into triangle wedges, almost like slicing a pizza. I like doing this step first because once the skillet starts cooking, everything moves pretty quickly. The tortilla triangles may look simple now, but they turn into little flavor soaked bites once they simmer in the sauce.
Step 2: Brown the Beef and Vegetables - Place a large skillet over medium heat and add the ground beef, diced onion, and bell pepper. As the beef cooks, break it apart with a spoon or spatula so you end up with small crumbles throughout the skillet. Cook everything until the meat is no longer pink and the vegetables have softened. The onion should smell sweet and savory by this point, and the peppers should have just a little tenderness left.
Step 3: Add the Seasonings and Beans - Once the beef is fully cooked, stir in the taco seasoning, minced garlic, and black beans. Give everything a good stir so the seasoning coats the meat evenly. Let it cook for another minute or two so the garlic becomes fragrant. This is the point where the whole kitchen starts smelling like your favorite Tex Mex restaurant.
Step 4: Stir in the Tortillas and Sauce - Add the tortilla triangles right into the skillet along with half of the shredded cheddar cheese and both cans of enchilada sauce. Stir gently so the tortillas get coated without completely falling apart. Cover the skillet with a lid and let it simmer for about eight minutes. This gives the tortillas time to soften and soak up all those bold flavors.
Step 5: Finish Simmering the Skillet - After the first simmer, uncover the skillet and give everything a gentle stir. Cover it again and continue simmering for another five to seven minutes. The mixture should look thick, bubbly, and cheesy by now. The tortillas will have softened into layers almost like a casserole, and every bite will be loaded with flavor.
Step 6: Melt the Cheese and Garnish - Sprinkle the remaining cheddar cheese evenly over the top of the skillet. Cover it one more time and let the cheese melt until gooey and irresistible. Right before serving, scatter chopped cilantro over the top for a little fresh flavor and color. Serve it hot straight from the skillet with your favorite toppings nearby.