Despite the older generation's lingering fear that even stepping outside of your car in Echo Park will somehow get you assaulted or shot or worse (suburban Boomers, I'm looking in your direction!), this increasingly gentrified neighborhood has become a new mecca for intelligent, classy dining. Joining Lot 1 and Masa is Restaurant 15, a hip spot with a cool interior, but also a menu that still seems to be a work in progress. 15's......