Best Turkey Tetrazzini Recipe | Saveur

Ingredients

• 6 Tbsp. unsalted butter
• 1 medium yellow onion, coarsely chopped
• 1 lb. button mushrooms, thinly sliced
• 1 red bell pepper, stemmed, seeded, and coarsely chopped
• ¼ cup all-purpose flour
• 1 cup chicken or turkey stock
• 1 cup milk
• 2 cups coarsely chopped cooked turkey
• 1½ cups shredded cheddar, divided
• ½ cup freshly grated parmesan
• 2 Tbsp. sherry
• 1 lb. spaghetti
• ½ cup frozen peas
• Kosher salt and freshly ground black pepper