Sweet and Savory Stuffed Mushrooms

Name: Sweet and Savory Stuffed Mushrooms
Ingredients: 24 large white or cremini mushrooms, wiped clean, stems finely chopped for the filling; 2 tablespoons extra-virgin olive oil; Kosher salt; 4 tablespoons (1/2 stick) unsalted butter; 1 cup finely chopped onion; Kosher salt and freshly ground black pepper; 1/2 cup finely chopped cooked bacon; 1/2 cup grated provolone; 2 tablespoons finely chopped dried apricots; 2 tablespoons finely chopped walnuts; 1 cup coarse fresh challah breadcrumbs