Cauliflower-pesto gratin

Less a gratin, and more chunks of cauliflower covered with pesto, cheese and breadcrumbs. But who cares, it still tastes good.

1 head of cauliflower, cut into large pieces and boiled briefly (not cooked all the way through)
pesto
1/2 cup shredded gruyere or swiss cheese
1/4 cup breadcrumbs

Coat the cauliflower in the pesto and place into a casserole dish. Cover with cheese and breadcrumbs. Bake at 450 for 10 minutes or so, until the cheese is melted.