01 -
Preheat your oven to 375°F (190°C) and lightly grease a 9×13-inch baking dish.
02 -
Slice each croissant in half horizontally. Place a half slice of cheddar cheese on the bottom half of each croissant, followed by a slice of ham, and then another half slice of cheese. Place the top half of the croissant over the fillings to form a sandwich.
03 -
In a small bowl, combine the softened butter, yellow mustard, honey, and Worcestershire sauce. Mix until smooth.
04 -
Spread the butter mixture evenly on the inside of each croissant sandwich.
05 -
Place the assembled croissant sandwiches in the prepared baking dish. In a small bowl, whisk together the egg white with a splash of water. Brush the tops of the croissants with the egg wash and sprinkle with poppy seeds.
06 -
Bake in the preheated oven for 15-18 minutes, or until the cheese is melted and the tops are golden brown.
07 -
Remove from the oven and serve while warm.