off the top of my head the ones that we grow and are fruiting (New Zealand):
Fejois (tons of em), persimmons, guavas, bannana, lemons (just started), avocados (nearing the end), quinces (gotta make jelly today), apples (we have picked golden delicious and cooking apples will be ready soon, I'm going to make some cider), figs (nearing end), Casimiroa, tamarillo, rocoto chilli. I think kiwi fruit are fruiting too but we don't grow any.
My favourite sandwich ingredient would have to be avacado. Though I realise its unobtainable for most people, Im lucky to grow 2 fruiting tree's so get em for free.
fresh baked bread with a drizzle of olive oil. Toped with avacado, homegrown olives tomato and lettuce (and some very old Edam if you feel like it). But don't forget to add some homemade Rocoto chilli sauce somewhere along the way, adding some sweet tropical spice.
Unfortunately avacados are seasonal. We get them for about half the year. For the other half I must sit and wait, patiently biding my time. Waiting for the sun to rise on a day when the avacados will ripen once more.