Grilled Greek Chicken Kebabs with Simple Tzatziki Sauce

plain Greek yogurt

English cucumber, shredded

garlic, pressed through a garlic press (or finely minced)

red wine vinegar

Salt and pepper

Squeeze of fresh lemon juice

Extra virgin olive oil

garlic, finely minced

fresh lemon juice (from about 1 large lemon)

red wine vinegar

olive oil

plain yogurt

dried oregano

dried basil

dried thyme

dried coriander

salt

pepper

boneless, skinless chicken breasts, cut into 1-inch pieces

small to medium zucchini, sliced 1/2-inch thick

red peppers, cut into squares

red onion, cut into squares