There is also something called a gorilla sandwich. You can buy them in some areas. I think Whole Foods sells. Or you can do at home. Take a cucumber, cut one end so that it grows best you can. I've never tried this, but have heard that an iced tea spoon works well. You can save the hollow cucumber, chop and place in sandwich filling. The best fills, as it would be something like an egg salad, chicken or tuna. Fill the cucumber and wrap in plastic.