In medium microwavable bowl, place cauliflower and water. Cover; microwave on High 6 minutes; drain. In small bowl, mix 2 tablespoons of the melted butter, the garlic powder and salt; pour over cauliflower in bowl. Carefully stir until coated. Sprinkle with cheese; carefully stir to coat. Arrange in pan. Bake 15 to 18 minutes or until cauliflower is tender and lightly browned in places.