Glad you got to experience the excellent desserts at the Spot on St. Marks.
Last summer, two New York friends and I visited the same place; I remember the green tea tiramisu and those little cakes very well.
If you're looking for authentic Neapolitan pizza in mid-town Manhattan, an excellent new spot has opened on 50th Street, just west of eighth avenue.http://donantoniopizza.com/
One of the partners in Keste, down on Bleecker Street in the Village, opened Don Antonio's, which I prefer to Keste.
Warning: if it's crowded, it gets very noisy and hard to communicate with friends if you're over 60!
Cheers for the season,