Sumac Onions are a vibrant and zesty addition to any meal, transforming simple dishes into flavorful delights. This easy recipe features thinly sliced red onions seasoned with tangy sumac, salt, olive oil, and vinegar, creating a refreshing condiment or side dish that complements everything from salads to sandwiches. Perfect for gatherings or quick weeknight dinners, these onions bring a burst of flavor that elevates your meals without requiring much prep time. With their bright taste and appealing crunch, Sumac Onions can be made ahead and stored in the fridge, making them a versatile staple that adds an exciting twist to your culinary repertoire.