1 head cauliflower
1 tsp. mustard
1/2 c. mayonnaise
1 c. Cheddar cheese

Boil or steam whole head of cauliflower until tender (8 or 9 minutes) in salted water. Drain.

Meanwhile, mix 1/2 cup mayonnaise and 1 teaspoon mustard. Put cauliflower into baking dish. Coat with mixture and sprinkle with 1 cup shredded cheese. Put into 350 degree oven for about 10 minutes to melt cheese.