Combine first 7 ingredients in a medium saucepan; stir well. Bring to a boil, and cook 2 minutes, stirring occasionally. Remove from heat; discard bay leaf, and stir in 1/8 teaspoon salt. Pour into a bowl; let stand 2 hours.
Sprinkle remaining salt and pepper over fish. Arrange 2 1/2 cups spinach in a vegetable steamer, and top with fish. Arrange remaining spinach over fish. Steam, covered, 9 minutes or until fish flakes easily when tested with a fork.
Divide spinach and fish evenly among 4 individual plates, and top with pickled vegetables and juice mixture.