Heat oven to 350°F. In medium bowl, mix chicken spread, mushrooms, cashews, chives and pepper.
If using crescent rolls: Unroll both cans of dough; separate dough into total of 8 rectangles. Firmly press perforations to seal. If using dough sheets: Unroll both cans of dough; cut dough into total of 8 rectangles.
Place cheese slice half in center of each rectangle. Spoon chicken mixture evenly over cheese. Fold short ends of dough over filling; pinch edges to seal. Place dough packets on ungreased large cookie sheet or 2 small cookie sheets.
Bake 18 to 20 minutes or until golden brown. Serve warm or cool. Garnish with grape clusters.