1Heat oven to 375°F. Spray 9 regular-size muffin cups with cooking spray.
2Separate dough into 8 biscuits; cut each biscuit in half crosswise, making 2 thin dough rounds. Brush mustard evenly on 1 side of each dough round. On mustard side of 8 of the rounds, place 2 cheese quarters and 2 ham quarters; top each with second dough round, mustard side down.
3Place filled biscuits in muffin cups, edges facing toward bottom of cup; gently fan out edges.
4Bake 12 to 15 minutes or until golden brown. Serve warm.