Happy birthday to you…Okay, so I didn’t plan this, but Marination Mobile (mentioned just a few minutes ago as serving one of Seattle’s Essential Dishes) is also celebrating a birthday. A big and important one, too. As of Tuesday, June 15, Big Blue will have survived its first year in the restaurant business.The first year? That’s the worst one for almost any start-up. Year one is where everyone is still getting their legs under them, where menu and cuisine and prep and production are all still coming together. In many cases, restaurants never even make it to their first anniversary (even fewer see number three), but making it that far is a major milestone and bodes well for the future.To celebrate (and to give a little back to all those who’ve made Marination one of the best known food trucks in the region), they’re going to be giving away free desserts to anyone that comes looking for a little Korean-Hawaiian fix on that special day. On June 15, Big Blue is scheduled to be slingin’ tacos and sliders in Belltown (at 2500 1st Avenue) from 11am to 2pm, so that’s where the party will be.I’d mark your calendars now just so you don’t forget.