Drain the pear halves well. Then, frost the rounded side with cream cheese which has been softened. Add a drop of milk to ease spreading, if necessary. Place the pear half, frosted side up, atop salad greens. Visualize that the widest part of the pear is the base of the Christmas tree. Add "tree decorations" by strategically embedding the silver "ornaments", nonparels on the cream cheese frosting, simulating ornaments. Red cinnamon hearts add even more color. Serve each tree with the widest side toward the diner. Add a star to the top of the tree by using a star shaped canapé cutter with a piece of your favorite sliced cheese.