skate is one of my top fav fishes, so silky . Like no other fish. My frustration with it in restaurants is that 99% of chefs, even the good creative ones, serve it with the same stupid brown butter caper sauce. yech(imo of course). it is just the oddest thing. imagine creative chefs only being able to serve beef as a plain steak.... Anyway, can't say when, but i have seen it on menus at EVOO, Gargoyles, 51 Lincoln, Aquitaine.
Btw, Courthouse Fish Market has it fresh and they will remove the central 'wing' plate for you, leaving 2 lovely but fragile thin 'filets' of fish. (I bet that if it is not already on the menu of their Seafood restnt next door, they would serve you a deep fried version.) At home, I sautee it w/ various treatments and I always put it in my Diana Kennedy Mexican fish soup and other fish stews. So glad you discovered it!
350 Third Street, Cambridge, MA 02143
51 Lincoln Street, Newton, MA 02461