PREHEAT oven to 375°F. Mix cream cheese spread, dressing and mustard in medium bowl until well blended. Add turkey and cheese; mix well.
PRESS or roll out each biscuit to 3-1/2-inch circle. Spoon heaping teaspoonful of the cream cheese mixture onto centre of each biscuit; fold biscuit in half. Press edges of dough firmly together to seal. Place on ungreased baking sheet.
BAKE 10 to 12 min. or until lightly browned. Serve warm.