Here's one that uses asparagus, but I think you could substitute green beans:

Mock Guacamole

1 (10 1/2 ounce) can cut asparagus, drained
1/2 cup chopped tomato
1/4 cup chopped onion
1 Tblsp lemon juice
1 Tblsp fat free mayonnaise
1/2 tsp garlic salt
1/2 tsp chili powder
1/2-1 Tblsp chunky salsa

Process asparagus in food processor until smooth. Combine asparagus with remaining ingredients and mix well. Place mixture in a paper towel-lined wire mesh or colander and let drain 1 hour. Cover and chill. Yield: 1 cup.