When life gives you apples, make this quesadilla recipe. Thin slices of sweet-tart apple rest on a bed of melty cheddar cheese. But the secret ingredient here is the schmear of tangy honey mustard spread on the flour tortilla. For maximum delight, be sure the quesadillas turn a beautiful golden color and get a chance to crisp up in the skillet before flipping. Honeycrisp apples will hold their shape in this easy quesadilla recipe, but if you can't find them, shop for Gala, Braeburn, or the Pink Lady variety.