Combine cream cheese with mustard, brown sugar, and Worcestershire in a mixing bowl.  Add ham and cheeses and mix well to blend.

Cut the biscuits into 1/4s.  Spray mini muffin pans with cooking oil spray.  Flatten and shape each biscuit piece into a square and place in pan, pressing dough down in the center.  Fill center of dough pieces generously with ham mixture.  I found it easiest to use my fingers for this.  Bake filled dough for 25-35 minutes until dough is cooked through and golden.  Baking time will depend on pan used and your oven, so start checking after 20 minutes. Serve warm or at room temperature