This dish is shown with festive yellow cauliflower, but of course it would work equally well with a white cauliflower. It is relatively low in fat, yet because of the chestnuts and cheese, has a really rich flavor.
Heat oven to 400 degrees. Microwave cauliflower in a small amount of water until slightly softened. Mix herbs, cheese and breadcrumbs. Add 3/4 of mix to drained cauliflower. Spray baking pan with oil. Add cauliflower herb mix to pan. Top with remaining herb, cheese and crumb mix. Bake covered until cheese begins to melt (about 10 minutes) and then a few minutes more, uncovered, until top is browned.