Greek Chicken Kebabs

boneless, skinless chicken breasts (about 2 large breasts)

plain Greek yogurt

olive oil

lemons, juiced and zest of one lemon

garlic, pressed or minced

dried oregano

kosher salt

freshly ground black pepper

red onion, quartered into 1-inch pieces

small zucchini, sliced into ¼ inch coins

red bell pepper, seeded and cut into 1-inch pieces