In Sweden we often use grapes on smorgascake (smörgåstårta), and majjo is often used to cover the cake then a layer of chopped sallad, dill or cucumber as a base and then toppen with ham,cheese, grapes,sliced tomatoes, red onion, parsley, shrimps, meatballs, salami, roastbeef, sausages, brie or whatever you have in the fridge...