Begin by preheating a large, well-oiled cast iron skillet or griddle over medium-high heat for about 5 minutes.

While the skillet heats, form the ground beef into thin patties about ¼ inch thick, then place them on the skillet and smash them down gently.

Cook the patties for 3-4 minutes until crispy and browned, then remove from the skillet.

Assemble your quesadillas by placing one tortilla on the skillet, topping it with a cooked patty, cheese, and optional toppings, then cover with another tortilla.

Cook the quesadillas for 3-4 minutes on one side until golden brown, then flip and cook for another 3-4 minutes until crispy and cheese is melted.

Remove the quesadillas, let sit for a minute, slice into wedges, and serve immediately.