01 -
Heat a nonstick skillet over medium heat and melt the unsalted butter until just foaming.
02 -
Lay the flour tortilla flat in the pan. Evenly distribute grated cheddar cheese and crumbled bacon over the tortilla, then drizzle with ranch dressing.
03 -
Allow the tortilla to cook until the underside turns golden brown and the cheese begins to melt, about 2-3 minutes.
04 -
Carefully flip the quesadilla and continue cooking until the second side is browned and the filling fully melted, approximately 2-3 more minutes.
05 -
Remove the quesadilla from the skillet and place on a cutting board. Let rest for one minute, then slice into wedges.
06 -
Arrange quesadilla wedges on a plate. Top with shredded lettuce and diced tomatoes. Serve immediately; optional extra ranch dressing for dipping.