herbed turkey tetrazzini

Ingredients

• 2 cups chopped turkey breast meat
• 2 tablespoons olive oil
• 1/4 cup chopped onion
• 1/2 cup chopped fresh mushroom
• 1/4 cup butter, melted
• 1/4 cup all purpose flour
• 1 cup whole milk
• 1 cup chicken broth
• 2 tablespoons fresh chopped parsley
• 1 teaspoon dried whole tarragon
• 1/8 teaspoon pepper
• 1 dash ground nutmeg
• 2 1/2 cups cooked spaghetti or fettucine
• 1 cup mozzarella cheese, divided
• - chopped parsley