1 lg. head cauliflower
1/2 c. mayonnaise
1 1/2 tsp. mustard
2 tsp. grated onion
dash of salt
1 c. shredded cheese

Break cauliflower apart and steam 20 minutes or so. Mix remaining ingredients together, toss mix with the cauliflower. Put in the oven just long enough to melt the cheese.