Red onions are a type of onion known for their distinctive deep purple skin and mild to sweet flavor. They have a crisp texture and are often used raw in salads, sandwiches, and salsas to add a pop of color and a subtle bite. When cooked, red onions can become sweeter and are popular in a variety of dishes including stir-fries, roasted vegetable medleys, and caramelized onion recipes. Their vibrant color and versatility make them a favorite in both culinary and decorative applications.