- Preheat oven to 350°F. In medium bowl, combine first 7 ingredients. Salt and pepper as desired.
- Divide filling among mushrooms and place on a greased, large rimmed baking sheet.
- Bake 15-20 minutes or until mushrooms are tender and filling begins to brown. Serve warm.
Makes 12 servings.
Make Ahead: Prepare through step 2 up to 1 day ahead. Refrigerate in an airtight container. Preheat oven to 350°F and continue with step 2.