This article discusses how za'atar, a Middle Eastern spice blend, can be used to add a fresh and bold flavor to the classic green bean casserole. The author suggests adding za'atar to the creamy mushroom sauce and provides a starting point of 1 tablespoon per pound of green beans. They also recommend pairing the upgraded casserole with other flavorful sides like saffron rice pilaf or garlic mashed red potatoes. Additionally, the article suggests topping the casserole with crispy fried shallots or toasted za'atar breadcrumbs for added crunch. The dish can be made in advance and stored in the fridge without losing its texture.