Tangy Mustard Cauliflower
["1 medium head cauliflower", "1/4 c. water", "1/2 c. mayo or salad dressing", "1 tsp. finely chopped onion", "1 tsp. prepared mustard", "1/4 tsp. salt", "1/2 c. shredded Cheddar cheese"]
["Place cauliflower and water in a 1 1/2-quart covered casserole.", "Microwave 9 minutes on High; drain.", "Combine mayo, onion, mustard and salt.", "Spoon mustard sauce on top of cauliflower.", "Sprinkle with cheese.", "Microwave 2 to 3 minutes. Let stand 2 minutes.", "Serve."]
["head cauliflower", "water", "mayo", "onion", "mustard", "salt", "Cheddar cheese"]