In place of the filling below, you may also stuff mushroom caps with goat cheese mixed with minced garlic and herbs, any flavored butter, or Creamed Spinach.
Preheat the oven to 375°F. Clean, then remove and reserve the stems from:
Count out 24 same-sized mushroom caps and toss with:
Slice the remaining caps. Chop the stems. Heat in a medium skillet over medium heat:
Add the sliced mushrooms and stems along with:
Cook, stirring occasionally, for 5 minutes. Stir in:
Transfer to a food processor and coarsely chop the mixture. Season with:
Fill each mushroom cap with a heaping tablespoon of the filling. Place on a baking sheet. Sprinkle with:
Bake until the tops are bubbling, about 15 minutes.