Line a baking sheet with parchment paper and spread an even, thick layer of grated cheese in a rectangular shape.
Arrange the slices of white onion and salami evenly on top of the cheese layer.
Bake in the oven until the cheese is completely melted, bubbling, and the edges are browned and crispy.
Remove from the oven and top one half of the baked cheese sheet with shredded lettuce and sliced jalapeños.
Carefully fold the other half of the crispy cheese over the fillings to create a sandwich or wrap.
Cook it hands-free.
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