01 -
In a small bowl, mix all the dipping sauce ingredients together. Cover and refrigerate until ready to use.
02 -
In a large skillet, brown the ground beef and chopped onion over medium heat until the meat is fully cooked and the onion is soft. Drain excess fat if necessary, and season with salt, pepper, and garlic powder.
03 -
Stir Worcestershire sauce, ketchup, mustard, and relish into the beef mixture. Let cool slightly before assembling quesadillas.
04 -
Place 2-3 slices of cheese on half of the tortillas. Evenly distribute the beef mixture over the cheese, add 2 more slices of cheese on top, and cover with another tortilla.
05 -
Heat a lightly greased large skillet over medium-high heat. Cook each quesadilla for 2-3 minutes per side until toasted and the cheese has melted.
06 -
Slice the quesadillas into quarters, serve with the dipping sauce, and enjoy.