Tropical Mousse Cake

The small black seeds in passion fruit are completely edible, although they are a little harder than those of other fruits such as raspberries, strawberries, and the one I use in the variation of this recipe, kiwi. You may be tempted to strain them out of the passion fruit jelly, as is done when making the filling. This is up to you; they are left in as a purely decorative measure, so the only impact will be to give the final product a less interesting appearance.