Preheat your oven to 375°F.
Place all the veggies and olives in a baking dish. Season with salt, pepper, oregano, and garlic. Drizzle with olive oil, stir to combine, and coat evenly. Bake for 35-40 minutes or until the veggies are tender.
Heat olive oil in a pan over medium-high heat.
Season both sides of the chicken with salt, pepper, and za'atar. Cook for 5-6 minutes per side or until the chicken reaches 165°F.
Divide the cooked chicken and veggies onto plates and garnish with feta, tahini, cucumber sauce, and/or hummus, if desired.
Store any leftovers in the fridge for 3-4 days.