Ingredients
Method
- Preheat oven to 375°F. Line a baking sheet with parchment paper.
- Clean mushrooms with a damp paper towel. Remove stems and chop them finely. Use a small spoon to scrape out the dark gills from inside the caps, creating room for filling.
- Pulse the challah pieces in a food processor until you have coarse breadcrumbs. You want some texture, not powder.
- Heat 2 tablespoons olive oil in a large skillet over medium heat. Add the diced onion and cook for 4-5 minutes until softened.
- Add the chopped mushroom stems and garlic to the skillet. Cook for 3-4 minutes until the stems release their moisture and start to brown.
- Stir in the breadcrumbs, parsley, thyme, salt, and pepper. Mix well to combine. If the mixture seems too dry, add a tablespoon or two of vegetable broth until it holds together when pressed.
- Brush the mushroom caps with the remaining olive oil and season lightly with salt and pepper.
- Fill each mushroom cap with the breadcrumb mixture, mounding it slightly. Press gently to pack the filling.
- Arrange stuffed mushrooms on the prepared baking sheet. Bake for 18-20 minutes until the mushrooms are tender and the tops are golden brown.
- Let cool for 5 minutes before serving. Garnish with additional fresh parsley if desired.
Notes
These can be assembled up to 4 hours ahead and refrigerated. Add 2-3 minutes to baking time if cooking from cold. Store leftovers in the refrigerator for up to 3 days and reheat in a 350°F oven for 8-10 minutes.
