This is not a joke. It's wrapped in lavash rather than a stretchy tortilla; filled with falafel, lamb or chicken shawerma, or charbroiled lamb or chicken chunks instead of beans and rice; and tricked out with cucumber salad, seasoned onions, chopped parsley, broiled tomatoes, and tahini sauce in place of salsa and guacamole. But it looks and eats just like a burrito, a truly massive one as well as a truly Mediterranean one, and even at the Mission branch of this falafel house, located smack dab in the middle of burrito heaven, you'd be hard pressed to find a more generous or delicious wrapped sandwich (it runs $5.45 to $6.95). We're partial to the slightly wacky falafel deluxe, in which the crisp mashed chickpea patties and the accouterments mentioned above are augmented by nice oily strips of broiled eggplant and fat french fries -- a textural delight. We've never managed to finish a Truly Mediterranean burrito in one sitting.