01 - Preheat a large cast iron skillet or griddle over medium-high heat.
02 - Divide ground beef into 8 equal portions and roll each into a ball.
03 - Place each tortilla on the work surface, set a beef portion in the center, and press to flatten so the beef covers most of the tortilla.
04 - Once the skillet is hot, position the tortilla and beef assembly meat-side down onto the skillet. Firmly smash beef into a thin layer using a flat spatula. Season with salt and black pepper.
05 - Cook for 2 to 3 minutes until the beef is browned and edges are crisp. Flip so tortilla faces the skillet, then immediately top beef with half a cheese slice. Cook for 1 more minute to toast the tortilla and melt the cheese.
06 - Remove from skillet and repeat the cooking process for remaining beef-tortilla assemblies.
07 - Top each taco with lettuce, onion, tomato, pickles, and preferred sauces. Fold and serve immediately.