Place Bread On An Ungreased Baking Sheet. Spread Each Slice With Mustard; Top With Ham. Using A 3-1/2-In. Egg-Shaped Cutter, Cut Mozzarella Cheese Into Egg Shapes (Discard Trimmings Or Save For Another Use). Using A Sharp Knife, Cut Zigzags In The Middle Of Each Egg Shape. Place On Ham, Leaving 1 In. Of Space Between The Two Pieces. For Each Chick, Sprinkle Cheddar Cheese Between The Two Egg Pieces. Broil 4 In. From The Heat For 2-3 Minutes Or Until The Cheese Is Melted. Cut Olives Into Eight Triangles For Beaks And 16 Small Pieces For Eyes. Arrange On Chicks.