Nothing tried-n-true here, but since nectarines and almonds aren't very
distant relatives, how about a simple shortbread crust for the tart
that includes ground almonds? Add a vanilla pastry cream, nectarines,
and maybe as a switch from the everpresent apricot jam glaze, glaze the
whole thing with a light coating of seedless raspberry jam so you can
look at it through rose-colored glazes? Might be a nice combo...

Dan Masi