In 1-quart saucepan, cook bacon and onion over medium-high heat, stirring frequently, until bacon is cooked and onion is tender. Drain bacon and onion. In same saucepan, heat water and bouillon granules to boiling. Stir in bulgur; remove from heat. Cover and let stand 15 minutes. Stir in bacon mixture, zucchini, mushrooms and thyme.