Variations on these would be to add green-tinted shredded coconut for lettuce. You could add a "slice of cheese" by flattening a yellow starburst candy (see my hamburger made out of cupcake and brownie video here:) ...
by Montreal Confections
by Cookies Cupcakes and Cardio
by Just Cake It
by CherrylanesCupcakes
by Haniela's