What is the difference between wild and farmed? Can you cure a fish if it isn't sick in the first place? Doesn't spawn sound like a dirty word? You can learn the answers to these questions and more at Starwich's first "ingredient tutorial," featuring salmon, tomorrow, February 7, 6:30pm-8pm at its 42nd Street location. A tasting will be held after. The best part--it's free! Call (212) 462-2310 to reserve a spot.