Parmesan Portobellos
Serves 6.
This is the kind of dish that makes entertaining possible. Almost everything can be done ahead of time. The initial roasting of the portobello can take place early in the day. Ditto the preparation of the white sauce. (Refrigerate both until ready to use, placing a piece of plastic wrap right down onto the sauce so it doesn't form a skin.)
About 30 minutes before your guests arrive, take 5 minutes and assemble the dish. While your guests are having drinks, pop the portobellos into the oven. And if they're done but you're not quite ready to start dinner, just set them aside in a warm place until you are.
6 portobellos, cleaned and stems removed
3 tbsp. olive oil
2 tbsp. unsalted butter
2 tbsp. flour