Created by Mikekey on October 23, 2013
Step 1: Preheat the oven to 375 degrees F. Line a large rimmed baking sheet with parchment paper.
Step 2: Rinse the mushrooms briefly and pat dry with a clean dish towel, taking care not to break them.
Step 3: Place the mushrooms upside down on the prepared baking sheet, drizzle each mushroom with ½ teaspoon tamari.
Step 4: Place the bread, walnuts, Italian herbs, olive oil, garlic powder and basil into a food processor. Process until the mixture resembles course crumbs. Fill each mushroom with 1/6 of the walnut mixture, patting it down firmly.
Step 5: Tent the mushrooms with foil and bake for 30 minutes.
Step 6: Remove the foil and bake for 10 minutes longer, until the topping is crisp and the mushrooms are tender.
Step 7: Serve immediately.