Appetizer tips from caterer to the stars

If you've ever attended -- or crashed -- a party at Jay-Z and Beyoncé's house, the spread might look something like this. Carla Ruben runs one of New York's most respected catering companies: Creative Edge Parties. The carters are among her elite clients, as well as Alicia Keys, H&M and the Whitney Museum. She started the company in her apartment when she was 27 and still hasn't lost that thrifty touch.