Quarter the eggplant & peppers, put into large bowl with tomatoes & coat w/olive oil. Either grill or roast in a 350F oven on a baking sheet until softened & charred. *Note: the tomatoes will not take as long. Start eggplant & peppers 1st.* This will take 10 - 15 minutes, depending on your oven or how hot your grill is. When they are done, sprinkle with kosher salt & place on a platter. Sprinkle with garbanzo beans.
Sauce: Whisk hot vegetable stock into tahini. Add garlic, lemon juice & zest, and salt.