01 - Heat a large nonstick skillet or griddle over medium-high heat until properly heated.
02 - Divide ground beef into 4 equal portions and shape into loose balls.
03 - Place beef ball onto one half of each tortilla and season with salt, pepper, garlic powder, and smoked paprika.
04 - Press each beef ball thinly and evenly onto tortilla using spatula or heavy pan with parchment paper.
05 - Sprinkle generous amount of shredded cheddar cheese evenly over smashed beef.
06 - Fold tortilla over filling to form half-moon shape and press gently to seal.
07 - Add 1/2 tbsp butter to skillet and cook quesadillas 2-3 minutes per side until beef is cooked through and tortilla is golden and crisp. Add more butter as needed for second batch.
08 - Remove from skillet and let rest 1 minute while preparing vegetables.
09 - Gently open each quesadilla and layer with lettuce, tomato, onion, pickles, and spoonful of burger sauce.
10 - Close quesadillas and cut into wedges. Serve immediately while hot and crispy.