To make filling: In a medium size mixing bowl, use a whisk to mix together mayonnaise, buttermilk, cream cheese, ranch dressing mix and garlic powder. To the bowl, add bacon, chicken and green onion. Mix well. cover and chill for 20-30 minutes.
Preheat oven to 350°F. Line a large baking sheet with foil. Spray liberally with cooking spray.
To assemble crescent ring: Place a ramekin or cereal bowl in center of baking pan. Arrange crescent triangles, slightly overlapping, around ramekin with pointed ends facing outwards.
Break or cut 5 slices of cheese in half. Arrange overlapping around base of crescent rolls. Top with chicken mixture, then top with whole slices of remaining cheese.
Bring pointed end of triangle over filling, tucking underneath the other side. Brush with butter and sprinkle with Parmesan cheese.
Bake for 25-30 minutes until golden. Let stand for 5 minutes then slice and serve garnished with chives and ranch dressing for dipping.
You can use light mayonnaise, low fat buttermilk, light chive and onion cream cheese and light butter in this recipe.