In Mexico, these quesadillas are known as sincronizadas, which translates as “synchronized”—an apt description for salty ham and melty cheese sandwiched between toasted tortillas. For assembly, we prefer to toss together shredded cheese and chopped ham, then distribute the mixture among the tortillas. Made this way, the quesadillas hold together better than if the fillings are simply layered on. Feel free to include other add-ins if you like, such as sautéed onions or mushrooms or cooked black beans. Flour tortillas work best, as corn tortillas turn brittle when toasted.