1. Wash cauliflower and separate into flowerets. 2. Place flowerets and water in a deep, 1 1/2-quart, heat- resistant, non-metallic casserole. 3. Heat, covered, in Microwave Oven 7 to 9 minutes. Set aside. 4. In a medium-sized, heat-resistant, non-metallic bowl melt butter, uncovered, in Microwave Oven 15 seconds. 5. Blend in flour and salt. Stir till smooth. Gradually add milk. 6. Heat, uncovered, in Microwave Oven for 1 minute. Stir. Heat an additional 1 1/2 minutes or until sauce is thickened and smooth. Stir occasionally. 7. Stir grated cheese into sauce. 8. Pour sauce over cauliflower and heat, uncovered, in Micro- wave Oven 1 minute or until cauliflower is heated through. 9. Sprinkle paprika over sauce before serving.