In a saucepan, bring broth to a boil. Stir in barley.
Reduce heat; cover and simmer for 40 to 45 minutes or until tender. Drain and cool.
In a large bowl, combine the corn, beans, peppers, onions, cilantro and garlic. Stir in barley.
Just before serving, combine the salsa, sour cream and lime juice; add to barley mixture. Serve warm or cold.