Clean mushrooms with damp paper towels; trim ends from stems. Set mushrooms aside.
Coat a large nonstick skillet with cooking spray; place over medium heat until hot. Add garlic; sauté 2 minutes. Add water and remaining 6 ingredients; bring to a boil. Add mushrooms. Cover, reduce heat to low, and cook 20 minutes or until mushrooms are tender, stirring occasionally.
Transfer mushroom mixture to a bowl; let cool. Cover and chill at least 8 hours. Drain mushroom mixture, discarding marinade.
Good flavor, but the coriander seeds were bitter. I only had 2 people to feed, so made 1/3 the recipe. By the end of the cooking period, there was no more marinade liquid left. I should've tried to get rid of the coriander at this point, before chilling the mushrooms... maybe next time.