01 -
Preheat the oven to 350°F. Line a rimmed baking sheet with parchment paper.
02 -
Place 24 crackers flat side up on the prepared baking sheet in a single layer.
03 -
Top each cracker with a folded piece of ham and one square of Swiss cheese, keeping the filling inside the cracker edges.
04 -
Place the remaining 24 crackers on top and press gently so the stacks hold together without breaking.
05 -
In a small bowl, stir together melted butter, Dijon mustard, Worcestershire sauce, garlic powder, dried minced onion, poppy seeds, and black pepper.
06 -
Brush or spoon a small amount of glaze over each cracker sandwich. Bake for 9-11 minutes, until the cheese is melted and the tops are lightly golden.
07 -
Let the sandwiches rest on the pan for 2 minutes, then move them to a platter and serve warm.