By Joyce Chua, Vancouver Foodie Tours Long gone are the days of food carts peddling only hotdogs and pretzels – in Vancouver food trucks showcase multicultural menus and gourmet ingredients. Take Kaboom Box, for example which is a staple in the heart of downtown. Locals swarm Kaboom Box on the daily, hungry for hot smoked salmon sandwiches, Pacific cod fish and chips, and gulf island oyster po’boys. It’s an obvious case for seriously delicious coastal food. What may come as a surprise to first-timers, is that Kaboom Box is dedicated to certified Ocean Wise seafood and sustainably produced meat. Their greens are organic, and all items are sourced locally, whenever possible. The notes are subtle, and it takes a keen eye to spot the Ocean Wise sticker on the side of the truck. But perhaps that’s the greatest allure of Kaboom is that they’re hardly self-righteous – quality ingredients are…