HELP!! I need some healthy appetizer ideas....?

My sister and her husband are coming over for some wine and appetizers this Friday, and I need some healthy appetizer ideas. My sister doesn't eat foods made with "white" ingredients (cream cheese, mayo, sour cream, etc.). She's crazy, I know. Her husband has heart issues so he really only eats low fat things (baked chips, etc.). What are some ideas besides just a plate of raw veggies??? I was thinking something like a mediterranean tray (hummus, pita, roasted red peppers, maybe a olive tapenade, pesto)?? What do you think? Any ideas for healthy appetizers? Please help!!