Greek Chicken Kebabs with Tzatziki Sauce

Greek chicken kebabs with a creamy Tzatziki sauce Prep Time: 30 minutes Cook Time: 20 minutes Total Time: 50 minutes Servings: 9 kebabs Calories: 86 calories Ingredients 1 3/4 - 2 lbs bonless skinless chicken breasts , diced into 1 1/4-inch cubes 1/4 cup + 2 Tbsp olive oil , divided, plus more for grill 3 Tbsp fresh lemon juice 1 Tbsp red wine vinegar 3 cloves garlic , minced 2 tsp dried oregano 1/2 tsp dried basil 1/2 tsp dried thyme 1/2 tsp ground coriander Salt and freshly ground black pepper 2 large red bell peppers , diced into 1 1/4-inch pieces 3 small zucchini (nearly 1 lb), sliced into rounds slightly under 1/2-inch thick 1 large red onion , diced into 1 1/4-inch wedges Tzatziki 1 ...