How to Make It
In a 12- by 15-inch baking pan, mix mushrooms, shallot, olive oil, melted butter, thyme leaves, salt, and pepper. Bake in a 400° oven, stirring occasionally, until mushrooms are tender and beginning to brown on edges, 12 to 15 minutes. Use immediately or let stand until ready to use, up to 4 hours.
Restaurant Mirepoix, Windsor, CA