what about home made pizza? you can always add veggies finely chopped to the tomato base, get the kids to make them and think of a design. you could use french bread, naan bread, pizza dough, bagels even. potato boats, microwave a potato, chop in half, remove the potato and mash up with anything you want, top with cheese, veggies or whatever you like, when cooked put a cocktail stick in with slices of cucumber/lettuce for the sail.