Dried onion is created by drying pieces of the onion vegetable. Onion is most commonly used as a vegetable with a strong flavor and some sweetness. Dried garlic is made from garlic cloves that have been processed into smaller pieces and dehydrated. Garlic is in the same family with onion, chives and shallots. Garlic are used for flavor within a dish. Garlic cloves are known for their pungent flavor and aroma.