Parmesan Stuffed Mushrooms

Parmesan Stuffed Mushrooms

1 lb. small to medium white mushrooms, stems removed and caps wiped clean
2/3 cup mayonnaise
2/3 cup freshly grated Parmesan cheese
1/2 cup grated mozzarella cheese
2/3 cup minced shallots or red onion
3 tablespoons minced fresh parsley
Salt and ground black pepper

In a medium bowl, combine the mayonnaise, mozzarella, Parmesan and onion and mix well. Season to taste with salt and pepper. Stir in the parsley. Cover and refrigerate for 30 minutes.
Preheat the broiler. Position the rack at least 5-inches from the heat. Spoon a generous teaspoonful of the stuffing into each cap, mounding it slightly. Arrange the mushrooms onto a broiler pan and broil for about 5 to 7 minutes, until the mushrooms are hot and the stuffing is slightly golden brown.