These pretty little tarts are perfect for winter cocktail parties. They're best eaten soon after assembly, so to make ahead, prepare the crusts, sweet cream cheese and fruit in advance, but assemble just before serving.
*To Section a Grapefruit
For pretty, membrane-free segments, start by slicing off the top and bottom of the grapefruit so it's flat on both ends. Set the fruit on a cutting board to trim off remaining peel and pith. You should be left with a "naked" fruit. Working over a bowl to catch slices, slice out one segment at a time, working your way around, folding over empty membranes like pages of a book.