This was a favorite food of mine, which I purchased regularly in W LA at the Japanese grocery store on Sawtelle. Surely, can find it somewhere in Manhattan?!
It's sold in the refrigerated section, in packets of 3 I believe. Custard-like, but with 0 carbs!! Each packet has an individual sweet, tawny-colored tiny additional packet meant as a topping. Think there were two varieties -- tofu-based and egg-based.
Would love to find it here!! Asked at Katagiri on 59th, but the clerk I spoke with had no idea what it was.