Preheat oven to 375℉.
Grease or line a large round pizza pan or stone with parchment paper. Arrange crescent rolls in a circle, short side in the middle/pointed ends out, slightly overlapping. With a small rolling pin or with your fingertips, flatten the center of dough to about a 5-inch wide base for the filling.
Evenly distribute ham on top of the flattened base followed by Swiss cheese slices.
Bring the outside points of the dough over the filling to the center of the ring and tuck under.
In a small bowl, whisk together butter and Worcestershire sauce. Brush on top of the dough. Sprinkle the dough evenly with poppy seeds and dried minced onion.
Bake 25 to 30 minutes or until dough is golden brown. Allow the ring to rest 10 minutes prior to serving.
For the dipping sauce, in a small bowl, whisk together mayonnaise, honey and dijon mustard. Serve in a small bowl in the center of the baked ring, garnished with lettuce around it if desired.