Walking into Ace Eat Serve, you'll notice two things: Everyone is having a great time, either sampling Asian-inspired finger food or scampering around the ping-pong tables in the back room, and every table is topped with a condiment caddie sporting jars of sludgy chile oil. Don't write off the homely paste as some off-brand bottled sauce, though; if you did, you'd be depriving yourself of one of the most addictive and attenuated flavor bombs you'll find anywhere in the city. Beneath the reddish-black surface lurks a mess of chile flakes, sesame seeds and something called textured vegetable protein. We don't know what it is, either, but the resulting homemade condiment delivers a dose of mouthwatering umami above and beyond the base combo of hot, salty and sweet. Slathered on bao buns or stirred into a noodle bowl, the chile oil does something that other sauces never dare: It adds crunchy texture as well as a load of flavor — so much so that you'll be tempted to eat it straight off the spoon.