LES Bites: Hester Street Fair, Walk-Up Window, Eldridge Street Eats

In Lower East Side food news:

• The Hester Street Fair goes on a health kick. Among Saturday’s offerings: seasonal produce from April Mae Farms in the Caskskills.

• The Times notices the walk-up window at Sauce.

• Serious Eats takes you behind-the-scenes of WD-50’s new tasting menu.

• The Voice checks out the best Chinese food on Eldridge Street.