Although I miss my NYC street cart version (fyi: the one on Broadway in SOHO near Dean & Delucca is amazing and so cheap $3.50) I've made my own version at home.
Whole Wheat Pita Bread
Baby Spinach Leaves
Sauteed Carrots, Onions and Red Bell Peppers
Taziki Sauce with Lots of Dill
Heat Pita. Assemble spinach, heated felafel, carrots, onion and bell peppers, and top with taziki sauce.