Organic Nation Seasoning Red onion powder is basically a ground form of dehydrated red onion. This is a great replacement for fresh onion. It is made from the finest quality dehydrated red onions. It has a slightly strong and sweet flavour. Onion powder may be used as a seasoning atop a variety of foods and dishes, such as pasta, pizza, and grilled chicken. Onion powder may be used as a seasoning atop a variety of foods and dishes, such as pasta, pizza, and grilled chicken. It is also a primary ingredient in beau monde seasoning