HEAT oven to 425ºF.
HEAT oil in large skillet on medium heat. Add mushrooms and onions; cook and stir 5 min. Add couscous; cook and stir 1 min. Stir in broccoli and broth. Bring to boil; cover. Simmer 8 min. or until liquid is absorbed.
MEANWHILE, place fish in shallow pan sprayed with cooking spray. Mix preserves and mustard; spread over fish. Bake 10 min. or until fish flakes easily with fork.
STIR Parmesan into couscous mixture. Serve topped with fish and cilantro.