Frozen chopped onion makes this dish even quicker to prepare. If you use them, add with the frozen mixed vegetables.
Bring barley and broth to a boil in a large saucepan. Reduce heat, and simmer 5 minutes.
While barley cooks, heat oil in a large nonstick skillet over medium-high heat. Add onion; sauté 3 minutes. Add mixed vegetables; sauté 2 minutes. Add vegetable mixture, chicken, salt, thyme, and pepper to barley mixture; simmer 4 minutes.
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