Grilled Greek Chicken Kebabs with Simple Tzatziki Sauce

Name: Grilled Greek Chicken Kebabs with Simple Tzatziki Sauce
Prep time: 1 h 25 min
Cook time: 6 min
Total time: 1 h 31 min
Cuisine: Mediterranean
Ingredients: 2 cups plain Greek yogurt; 1 English cucumber (shredded); 1 clove garlic (pressed through a garlic press (or finely minced)); 1 teaspoon red wine vinegar; Salt and pepper; Squeeze of fresh lemon juice; Extra virgin olive oil; 4 cloves garlic (finely minced); 2 tablespoons fresh lemon juice (from about 1 large lemon); 1 tablespoon red wine vinegar; 2 tablespoons olive oil; 2 tablespoons plain yogurt; 1 teaspoon dried oregano; 1/2 teaspoon dried basil; 1/2 teaspoon dried thyme; 1/2 teaspoon dried coriander; 1/2 teaspoon salt; 1/4 teaspoon pepper; 2 pounds boneless skinless chicken breasts (cut into 1-inch pieces); 3 small to medium zucchini (sliced 1/2-inch thick); 1-2 red peppers (cut into squares); 1 red onion (cut into squares)