Instructions

  1. Remove brown gills from the undersides of mushrooms using a spoon; discard gills. Remove stems, if necessary, and reserve for another use, if desired.
  2. Melt butter in a large skillet over medium heat; add leek and garlic, and sauté until tender.
  3. Remove from heat, and cool.
  4. Stir together avocado and next 3 ingredients in a medium bowl; stir in leek mixture.
  5. Press goat cheese evenly into mushroom caps; top evenly with avocado mixture.
  6. Sprinkle with walnuts, and drizzle with olive oil. Place on rack in a broiler pan.
  7. Bake at 400° for 5 minutes; cover loosely with aluminum foil, and bake 5 more minutes. Serve immediately. Garnish, if desired.