Set up the sandwiches: Onto the baking sheet, scatter half of the Ritz crackers. Put the remaining crackers on top after the ham and cheese.
Melt the butter and stir in the Worcestershire sauce, garlic powder, poppy seeds, dried chopped onion, Dijon mustard, and butter.
Spread butter mixture on top of sandwiches and brush them.
Put in the oven and bake for ten to twelve minutes, or until the crackers become golden and the cheese melts.
Before serving, let it cool somewhat.
Treat yourself to these tasty and simple Ritz Cracker Party Sandwiches!