Given the task definition and input, reply with output. In this task, you have to identify the named entities (NER) which are the ingredients required given its directions. Named entities are the names of the items without their quantity.

Preheat oven to 350 degrees., Prepare Pasta shells according to package directions and cook to al dente., While Pasta is cooking, combine other ingredients in a large bowl, and stir well enough to combine all ingredients thoroughly., Drain Cooked Pasta, and add to cheese mixture and thoroughly combine., Transfer to a large casserole dish, and bake at 350 degrees for approximately 30 minutes, or until cheese is completely melted and hot and bubbly., Let stand for 10 minutes before serving.
pasta shell, sour cream, colby cheese, Campbell's cheddar cheese soup, salt