Preheat oven to 375 degrees.
Open crescent rolls and place each triangle on your baking stone in a “sun” shape, using all the crescents and pressing slightly together in the middle.
In a large bowl, shred the chunk chicken. Add the mayo, mustard, bacon, Swiss cheese and stir to combine.
Spoon the mixture over the crescent ring.
Pull the crescent points up and over the middle and press down in the center.
Slice the Roma tomatoes in thick circles and then in half.
Press the halves down between the crescents.
Bake at 375 degrees for 25-30 minutes until the crescents are done throughout.
Slice and enjoy!