01 -
Heat olive oil or butter in a large skillet over medium heat. Sauté sliced onion and bell pepper for 8 to 10 minutes, stirring occasionally, until vegetables are softened and caramelized.
02 -
Incorporate minced garlic into the skillet. Continue cooking for about 30 seconds until the garlic becomes fragrant.
03 -
Add thinly sliced beef to the skillet. Season with salt and black pepper. Stir and cook just until meat is warmed through, then remove skillet from heat.
04 -
Place a tortilla in a clean or wiped skillet over medium heat. On one half of the tortilla, layer provolone cheese, followed by the cooked beef and vegetable mixture, and an additional layer of cheese if desired. Fold the tortilla over to enclose the filling.
05 -
Cook for 2 to 3 minutes per side, pressing gently with a spatula, until the exterior is golden and cheese has melted.
06 -
Allow quesadilla to rest for 1 minute, then slice into wedges. Serve hot with optional additions as desired.