In 4-quart saucepan or Dutch oven, cook onion and garlic in oil until onion is tender. Add remaining ingredients. Bring to a boil. Reduce heat to low; cover. Simmer 45 to 50 minutes or until barley is tender, stirring occasionally. Add additional water if soup becomes too thick upon standing. Ten 1-cup servings *NOTE: To use Quick QUAKER Barley, substitute 2/3 cup quick barley for medium barley and decrease water to 5 cups. Prepare recipe as directed above except simmer 15 to 20 minutes or until barley is tender, stirring occasionally.