This is a mobile socca oven. Socca ovens are traditionally wood or charcoal fired. The pancake mixture is cooked on a large copper pie plate called a 'plaque de socca' . The huge pie plate is visible in the photo leaning against the oven.
This is the socca man watching the socca . The socca plate stays at the front of the oven and the wood burns at the back. The copper plate is essential to allow the heat to be distributed evenly. It takes about 6 minutes for the socca to cook. This is the socca is nearly ready to eat. It always smells wonderful - but I am allergic to chickpeas so I've never tasted it.