chicken tetrazzini with cheddar and pimentos

Ingredients

• - 8 oz dry spahgetti
• - 1 cup thinly sliced celery
• - 1/2 cup diced onion
• - 4 tbsp. unsalted butter
• - 8 oz. button mushrooms, sliced
• - 1 cup diced green bell pepper
• - 1 tsp. inced garlic
• - 1/2 cup flour
• - 2 cups milk
• - 8 oz. shredded sharp cheddar
• - 1 jar pimentos, diced, 4 oz
• - 2 tbsp. worcestershire sauce
• - 1/8 tsp. ground nutmeg
• - 1/4 cup dry sherry
• - salt, black pepper and red pepper flakes to taste
• - 2 cups diced cooked chicken
• - 3/4 cup slivered almonds, toasted
• - 1 cup shredded parmesan