Slowly, slowly, Seattle is building up its Strategic Food Truck Reserve, preparing us all for the day when aliens come, destroy all our free-standing restaurants, and leave us only with a hardy band of devil-may-care food truck operators offering poutine, tacos, donuts and pork sandwiches to the starving masses from their mobile food service operations.The newest recruit is actually a bunch of different guys–architects, actually–who, when the recession hit in 2008 and they saw all the construction projects in town dry up, banded together to start Buns, a mobile gourmet burger trailer that’s gone through a month of friends-and-family and soft-open practice runs (their “beta,” according to the Buns on Wheels Twitter feed), and is now ready to go public.Kinda.Though the schedule on their website still lists them as being in beta-test mode and they have an awful lot of days marked off for out-of-town events, they are slowly adding on regular business days (like this Friday when the trailer will be in Northgate from 11am-2pm).It looks as though they’re going to be adding days (and menu items and locations) as the weeks progress, but for right now the gang of former architects (headed up by “project manager” Stewart Chung) are focusing on the day-to-day. They have a menu in place, and it is a simple one–grass-fed, free-range beef burgers from Thundering Hooves in Walla Walla mounted on fresh-baked buns from Seattle’s Grand Central Bakery and dressed with local, organic produce and… Well, that’s pretty much it. There’s fries on the menu, drinks and baseball hats with the Buns logo on them, but for right now Chung and company are keeping it simple.”We want to focus on only a few items and do them really well, rather than have 20 items and be mediocre,” according to Chung.That, and it’s easier to stay one step ahead of the restaurant-destroying aliens when burgers and fries are all you have to be concerned about.