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 deg., Cook zucchini in boiling water til tender. Drain and place in casserole., In a sauce pan, melt butter. Stir in sour cream, cheese, salt and paprika. Cook slowly until the cheese melts., Remove from heat and add egg and chives., Stir into 1 1/2 quart casserole with zucchini., Toss cracker or bread with 2 T. butter and put on top of the veggie mixture. Bake at 350 deg. for 20 minutes., Most of the time she used zucchini but other veggies also.
zucchini, butter, sour cream, cheese, salt, paprika, egg, chives, cracker crumbs, butter