Cream together the mayo, soup and sour cream. Add the chicken, and the vegi's. Microwave on high for 6 minutes. Pour into a 9x13 baking dish. Spread over top the pillsbury cresent rolls to make a crust. Top with shredded cheese, drizzle butter over top and sprinkle with nuts. Bake at 180ºC or 30-40 minutes until cooked and browned. Cool for 5 minutes, slice down the middle and then three cuts to make a total of eight peices. Serves 4 people, 2 slices each.