Well I don't know about you but it certainly looks like a microwave to me.
In 2006 DiGiorno released a brand new "Super-Tasty-Terrific-Solve-All-The-World's-Problems" Microwave Pizza. The primary claim being that even though it is prepared in the nuke box, it tastes like it came from the oven. To prove their point they slapped some wheels on a giant microwave.
In reality, the Microwave Truck is another great design from Turtle Transit and actually contains 16 operational commercial microwaves...all the better to prepare free samples for the pizza-loving masses.