Start by heating a skillet over medium heat. Add a small amount of butter or oil.

Once hot, add the diced onion and sauté until translucent, about 3-5 minutes.

Increase the heat to medium-high and add the ground beef to the skillet.

Season with salt and pepper. Cook until browned, breaking it apart with a spatula. Drain excess fat if necessary.

Lay the flour tortillas flat on a clean surface.

On half of each tortilla, sprinkle a generous layer of shredded cheese.

Next, add a portion of the beef mixture, followed by a few pickle slices. Top with more cheese and fold the tortillas over to encase the filling.

Lightly wipe the skillet clean and return it to the heat.

Place one or two quesadillas in the skillet (depending on your pan size) and grill for 2-3 minutes on each side, until golden brown and crispy.

Repeat with the remaining tortillas.

Once cooked, slice the quesadillas into wedges, serve hot, and enjoy the crispy, melty goodness!