Appetizer idea for meeting bf's parents?

Ok so I am meeting my boyfriends parents for the first time at a cookout. They're having a cookout for the OSU fb game this weekend and told me not to bring anything. I always take something to my family cookouts so I'd feel weird not to. I want to impress his family. We come from 2 different types of families. I am very much of a 'country girl' do all the 'tomboy' things. He is 100% city boy.. my family is white and his is black.... this is the first time ever meeting anyone in his family. The only thing I know not to bring is pork... umm I know his mom likes shrimp a lot but other than shrimp tail & hawian shrimp I don't know of anything else. Any ideas??