01 - Preheat a large cast iron skillet or griddle over medium-high heat.
02 - Divide ground beef into 8 equal portions, rolling each into a ball.
03 - Place each tortilla flat on your work surface. Set a beef ball in the center of each and press down with your hand or a spatula to flatten the beef, spreading it almost to the tortilla edge.
04 - Lay each tortilla-meat assembly meat-side down onto the hot skillet. Firmly press the beef into a thin layer with a large flat spatula. Season each patty with a pinch of salt and black pepper.
05 - Cook for 2 to 3 minutes, until the beef is well browned and crispy at the edges. Flip the assembly so the tortilla is now against the skillet. Top each with a half-slice of cheddar cheese. Cook 1 minute to toast the tortilla and melt the cheese.
06 - Remove from the skillet and repeat with remaining patties and tortillas.
07 - Top each taco with shredded lettuce, red onion, tomato slices, pickles, and drizzle with burger sauce, ketchup, or mustard as desired. Fold and serve immediately.