Vintage Limes and Green Peppercorn Fruit Cake

I can't imagine hollowing out whole limes for lime sherbet. But it’s hard to deny that they're adorable. And look at that mirrored fern vase!  Shades of Studio 54. Actually, it's Gourmet 1974. 

The sherbet, on the other hand, might be great on the Thanksgiving table; a fine counterpoint to all those heavy pies.  And if  you don’t want to spring for sauternes, a less exalted sweet white wine should work as well.  

Switching gears, here’s a recipe for an unusual fruitcake (green peppercorns?) from the same issue. Do the green pepper function like the black pepper in pfeffernusse?