01 - In a skillet over medium-high heat, cook ground beef seasoned with salt and black pepper, breaking it up with a spatula, until browned and fully cooked, about 6 to 8 minutes. Drain excess fat.
02 - Warm flour tortillas in a dry skillet or microwave until soft and pliable.
03 - Divide cooked beef evenly among tortillas. Layer each with shredded cheddar cheese, shredded lettuce, and a drizzle of ketchup.
04 - For additional crispness, fold the tacos and toast in a pan for 1 to 2 minutes per side until lightly golden.
05 - Serve tacos immediately while warm.