"Our definitive guide to the classic appetizer...."
INGREDIENTS
•
24 (2-inch wide) cremini or white button mushrooms (about 1 pound)
•
3 tablespoons olive oil, divided
•
3/4 teaspoon kosher salt, divided
•
1/2 teaspoon freshly ground black pepper, divided
•
2 small stalks celery
•
1 small shallot
•
1/4 cup chopped fresh parsley leaves
•
2 ounces whole-milk low-moisture mozzarella cheese, shredded (about 1/2 cup)
•
1 ounce Parmesan cheese, grated (about 1/4 cup)
•
1/4 teaspoon garlic powder
•
Pinch red pepper flakes (optional)
•
1/4 cup dry white wine or low-sodium vegetable broth
•
1 cup panko breadcrumbs
•
1 large egg