Place vanilla wafers on surface, flat side up. In a plastic food bag knead coconut with just enough green food coloring to tint it the color of shredded lettuce. Put one third of frosting into small bowl with just enough water to thin to consistency of buttermilk (pourable). Add a few drops yellow food coloring to resemble color or American cheese. Place a dab of frosting on flat side of each vanilla wafer and then a bit of tinted coconut. Place a Keebler cookie on top of that with a little bit of frosting and cover with flat sideof another vanilla wafer, using a little pressure to force some of the frosting to drip over sides resembling melted cheese. Wipe top of each assembled cookie in beaten egg white and sprinkle with a few sesame seeds before egg white can dry. Let stand at room temp until firm or set and wrap each in paper used to wrap the McDonald's hamburgers in. Store at room temp, covered, to use in a week or two.