Heat oven to 425°F. Spray 13x9-inch (3-quart) glass baking dish with nonstick cooking spray. Reserve 1/2 cup salsa for top. In sprayed baking dish, combine beans, bell pepper and remaining salsa; mix well.
Arrange fish over bean mixture. Spoon reserved 1/2 cup salsa over fish. Sprinkle with onions. Cover tightly with foil.
Bake at 425°F. for 25 minutes or until fish flakes easily with fork.
Meanwhile, in small bowl, combine parsley, lime peel and garlic; mix well. Serve fish and bean mixture sprinkled with parsley mixture.