The Picky Dinner Party

You have invited the following people to a dinner party:

Sally
Mary
Steve
Alice
Jim

Being a person, who plans ahead, you have already purchased food items for the party. Three days before the party, you begin to receive phone calls informing of certain foods which the invitees can not eat. One day is left before the event, and you have received the following from your apparently "picky" invited dinner guests:

Mary won't eat fish or spinach
Sally won't eat fish or green beans
Steve won't eat shrimp or potatoes
Alice won't eat beef or tomatoes
Jim won't eat fish or tomatoes

Pretty disgusted with all the eating restrictions, you sit and analyze the foods you already purchased:

green beans
roast chicken
creamed codfish
celery
roast beef
lettuce

Of the food you purchased, what can you serve to appease everyones diet peculiarities?