Andouille and Cornbread Stuffed Mushrooms

Name: Andouille and Cornbread 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; 1/2 cup finely chopped green bell pepper; 1/2 cup finely chopped onion; Kosher salt and freshly ground black pepper; 1/2 cup cooked and finely chopped andouille sausage; 1/2 cup grated Cheddar; 2 tablespoons chopped pickled jalapenos; 2 tablespoons chopped scallions; 1 cup crumbled cornbread