Shred leftover roast beef. Set aside onions from pot roast or dice and sauté if needed.
Grease skillet with oil or butter, and turn heat to medium. To a hot skillet, add tortilla and one one side approximately one ounce of shredded cheese. On top of cheese add approximately one ounce of shredded beef and a half ounce of onions, then another half ounce of cheese. Fold tortilla over and press down for about 10 seconds, then flip and continue cooking until second side is crisp.
Remove quesadilla to plate and repeat previous step with remaining tortillas and fillings. Serve with your favorite toppings!
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Notes
Serves 4 with other food (salad, etc) or 2 hungry adults.
Nutrition information is provided as a courtesy and is an estimate. It is recommended to use your preferred calculator with the actual ingredients you use for optimal accuracy.