Turkey a la King Recipe

Ingredients

• 1 medium onion, chopped
• 3/4 cup sliced celery
• 1/4 cup diced green pepper
• 1/4 cup butter, cubed
• 1/4 cup all-purpose flour
• 1 teaspoon sugar
• 1-1/2 cups chicken broth
• 1/4 cup half-and-half cream
• 3 cups cubed cooked turkey or chicken
• 1 can (4 ounces) sliced mushrooms, drained
• 6 slices bread, toasted