True to its name, the Basic 5 sandwich from the GreenGo Grilled Cheese Gastro Truck is pretty simple: provolone, sharp-aged cheddar, swiss, muenster, and mozzarella melted together on sourdough bread. From that modest foundation, however, Chef Gaston Corbala uses local and organic ingredients to build innovative variations on the classic sandwich from his eco-friendly food truck.

Into Gaston’s specialty grilled cheese sandwiches go everything from butter-fried lobster and smoked jalapeños to hamburger patties made from certified grass-fed beef. Gaston’s experiments get even adventurous with his monthly specials, which have included cheddar-cheese-crusted sandwiches with bacon and maple syrup, a tastier alternative to pressing your sandwich against a sappy tree.

Of course, Gaston happily relinquishes the fun of combining unorthodox flavors to his customers. Many sandwiches include a choice of at least one of Gaston’s from-scratch spreads, such as ale-beer chipotle mayo. And room can be made in any of GreenGo’s sandwiches for add-ons such as balsamic caramelized onions or organic pomodoro sauce.