Butternut Squash and Duxelles Casserole

Duxelles (pronounced dook-SEHL) is a paste of finely chopped mushrooms and shallots used to flavour classic French dishes. A food processor makes quick work of the chopping. The mixture is extemely versatile - try it spread on toast as an appetizer. This recipe is also a good way to use tough stems from shiitake and portobello mushrooms.