@Rockhead,
hummus
mashed chick peas and a bit of warm water, tahini, flavorings (salt, pepper, lemon, garlic, herbs, whatevah), olive oil. Whir it all up together into a paste.
tahini dressing
three acids (I usually use lemon juice, red wine vinegar and balsamic or apple cider vinegar), 1tsp dijon mustard (or spicy brown mustard), s&P to taste. dried or fresh herbs if you want. stir everything together and then slowly wisk in tahini instead of oil (about the same amt of tahini as acids).
edit: I've been eating tahini dressing over bean salad (red and white beans with chopped cucumber, tomato, onion, celery, carrots)