Melt-in-your-mouth baked croissant sandwiches of thinly sliced ham, Swiss cheese, and a delicious buttery Dijon and poppy-seed sauce! Perfect for luncheons or entertaining, or packed into picnic lunches; great served warm, or at room temperature. Use as much ham and cheese as you like! Sandwiches are easily made up in advance and individually wrapped in foil, then refrigerated or frozen (use a freezer bag) for later use. Defrost overnight in the fridge, then bake as directed. Or, if frozen, bake at 300 F for about 1/2 hour until warm. If using mini-rolls, you may place them in a buttered baking dish and bake for the specified amount of time (no need to individually wrap)--I've also microwaved them. Enjoy!