01 -
Preheat oven to 375°F. Lightly grease a 9×13-inch baking dish.
02 -
Split croissants and layer with cheese, ham, and more cheese.
03 -
Mix softened butter, mustard, honey, and Worcestershire sauce until smooth.
04 -
Spread butter mixture inside each croissant sandwich.
05 -
Brush tops with egg white wash, sprinkle with poppy seeds. Bake 15-18 minutes until golden and cheese melts.