Turkey Tetrazzini

Name: Turkey Tetrazzini
Ingredients: 12 ounces cremini mushrooms; 2 shallots (about 4 ounces each); 7 tablespoons unsalted butter, divided; 1/2 teaspoon kosher salt, divided; 1/4 cup dry white wine; 1/4 cup all-purpose flour; 1 1/2 cups low-sodium chicken or turkey stock; 1 1/2 cups whole milk; 1/2 cup heavy cream; 1 bay leaf; 12 ounces linguine; 3 cups cooked turkey (white or dark meat, or a mix of both); 1 cup frozen peas; 1 tablespoon lemon juice, from one half of a lemon; 2 teaspoons soy sauce; 1/2 cup grated Parmesan cheese, divided; 1/3 cup panko breadcrumbs; Kosher salt