Chicken Shawarma with Green Beans and Zucchini

Name: Chicken Shawarma with Green Beans and Zucchini
Ingredients: 1 Pound zucchini, sliced 1/4 inch thick; 0.5 Pound green bean; 0.5 Cup extra virgin olive oil; 0 kosher salt; 1.5 Teaspoon ground allspice; 1.5 Teaspoon ground black pepper; 0.5 Teaspoon ground white pepper; 0.25 Teaspoon cinnamon; 0.25 Teaspoon ground cumin; 0.25 Teaspoon ground coriander; 6 Count skinless boneless chicken thighs; 1 Count clove garlic, minced; 1 Cup plain low-fat yogurt; 2 Tablespoon fresh lemon juice; 6 Count 6-inch pitas, split horizontally; 0.5 Count small red onion, thinly sliced