(This venue closed in 2014 after 30 years.) When blueberries are in season, these nubbly half-moons ($7 per dozen) are wonderful with a little butter and sugar. To my taste, however, plum pierogi like the one shown here in cutaway view, from an autumn visit, are better with sour cream.
Sweet or sour? In truth, it's hard to go wrong either way.
First Avenue Pierogi & Deli
130 First Ave. (7th-8th Sts.), Manhattan