Turkey Tetrazzini Recipe | Leftover Turkey Pasta Casserole — The Mom 100

Ingredients

• ½ cup fresh breadcrumbs
• ½ teaspoon Kosher salt
• 2 tablespoons unsalted butter ((melted))
• ½ cup shredded Gruyere or Swiss cheese
• 12 ounces dried spaghetti ((snapped in half))
• 6 tablespoons (3/4 stick) unsalted butter ((divided))
• 1 medium onion ((chopped))
• 8 ounces sliced mushrooms ((any kind))
• Kosher salt and freshly ground black pepper ((to taste))
• ¼ cup all-purpose flour
• ½ teaspoon dried sage
• 1 cup chicken broth ((preferably less-sodium))
• 1 cup whole milk
• 3 tablespoons dry sherry ((optional))
• 3 cups cubed cooked turkey
• 2 cups frozen peas ((thawed))
• ½ cup chopped fresh parsley ((plus more for sprinkling))
• ¼ cup finely grated Parmesan cheese