Taken from my “Favorites” folder!
To save time the chicken filling mixture may be made up to a day in advance, in fact I recommend doing so to allow the flavors to blend, since I could eat this whole ring myself I have not listed the servings size but you should have enough to serve 6 people but it will depend on how large you slice the ring and since everyone usually wants seconds I most always make two rings 
INGREDIENTS:
1/2 cup mayonnaise (more if desired)
1/2 teaspoon garlic powder
1 tablespoon minced fresh parsley
2 teaspoons Dijon mustard
1 large green onion, finely chopped
2 cups finely chopped cooked chicken breast (I just use 3 whole chicken breasts, cooked and chopped)
2 bacon strips, cooked and finely crumbled
1-1/2 cups shredded Swiss cheese, divided
1/2 teaspoon seasoned salt, or to taste
fresh ground black pepper, to taste
2 (8 ounce each) tubes refrigerated crescent rolls
2 large plum tomatoes
shredded lettuce (use as much as you like)
INSTRUCTIONS:————————————
Preheat oven to 375 degrees F.
Set oven rack to lowest position.
Prepare and ungreased 12-inch round pizza pan.
In a large bowl combine the mayonnaise with garlic powder, parsley, mustard and green onion.
Stir in the chicken, bacon and 1 cup shredded Swiss cheese and seasoned salt, then season with black pepper (if the mixture seems to dry you can mix in a little more mayonnaise).
Unroll crescent dough; separate into 16 triangles.
Arrange on pizza pan, forming a ring with pointed ends facing outer edge of pan and wide ends overlapping.
Spoon chicken mixture over wide ends; fold points over filling and tuck under wide ends (filling will be visible).
Chop half of a tomato; set aside.
Slice remaining tomatoes; place over filling and tuck into dough.
Bake for 20-25 minutes or until golden brown.
Sprinkle with remaining 1/2 cup Swiss cheese.
Let stand for about 10 minutes.
Place lettuce in center of ring, then sprinkle the top of the lettuce with chopped tomato.
Slice the ring into desired size slices.