With the return of spring and warmer weather, Boston's lovely pedestrian walkway, the Rose Kennedy Greenway, is being overrun by trucks. The intrusion, however, is welcome, because the vehicles in question are food trucks. As part of the Greenway's Mobile Eats program, a record 30 vendors are hawking their gastronomical goodies for the 2014 season at 6 locations along the 1.5-mile ring of parks.

When I was younger, my dad owned a business in Chelsea that was visited a couple of times daily by an old-school canteen truck. You know, the kind with the pin metal exterior, lousy coffee served in generic blue cups, and soggy tuna sandwiches wrapped in cellophane. These food trucks are nothing like that. The roving restaurateurs, who aspire to gourmet greatness, offer an amazing variety of items, many of which are unexpected considering they are being served out of a food truck.

Take the Bacon Truck, for example. The new addition to the Mobile Eats lineup features thick-cut, locally sourced and smoked bacon and serves sandwiches such as the Turkey Bacon Brie, which includes turkey breast roasted on the truck, caramelized onions, and, of course, bacon. Also making its debut this year at the Greenway is Stoked Pizza, which pumps out pies cooked fresh in an onboard 6,000-lb, wood-fired oven. And newbie Zo on the Go offers what it describes as "authentic" gyros, yummy Greek sandwiches that include rotisserie-cooked pork or chicken, tomatoes, onions, and tzatziki sauce rolled in a warm flatbread. That last one really got me drooling.

Among the old favorites that have returned to tempt you with their treats (this is the fifth season that food trucks have been on the Greenway) are Clover Food Lab, which serves to-die-for vegetarian fare such as egg with eggplant sandwiches and fries dusted with rosemary, Bon Me, which prepares tasty Vietnamese sandwiches on toasted baguettes, and Cookie Monstah, which offers fresh-baked chocolate chunk, red velvet, and other sinfully good cookies.

You could wash everything down with a lukewarm cup of crummy coffee served in a generic blue cup that you might be able to find in your travels. Or you could opt for a fresh smoothie from Mother Juice, another new Greenway food truck. See the complete list and schedule of Mobile Eats vendors.

Photo: Zo on the Go.