Cauliflower with Mustard Sauce

1 large head cauliflower
2 T prepared mustard
6 T mayonnaise
2 t red wine vinegar

Prepare and cook the cauliflower in the usual way. In the meantime, add the mustard to the mayonnaise and thin with vinegar.  Mix this well. Drain the cauliflower, dry and place on a warm platter and pour the sauce over it. Four servings.

This recipe may be made equally successfully with broccoli instead of cauliflower.