Thanks Shells!  The peanut butter would make a good substitue for the sesame seed paste (tahini).  Mike is allergic to all things sesame so I haven't had humus in a long time.  (Not since he accidently found a bowl of it I was hoarding for myself in the refrigerator and broke out in spots.)  I'll have to try making it with the peanut butter.  I'll bet almond butter would work, too.

The sesame allergy is a real pain.  Try finding a hamburger bun without sesame seeds at a fast food place.  Every kind of pre-made bread crumbs has sesame seeds as an ingredient.  No Chinese food for Mike – he can't be sure what dish may have sesame oil in it.  No Japanese food — it's too hard for the chef to break the habit of sprinkling sesame seeds on the sushi.  So, I make my own — Chinese food, even sushi. And when we go out for a burger and the buns have sesame seeds we just switch — he gets two bottoms (they usually only have one or two seeds on the side of the bun) and I get both tops, covered with seeds.  What a pain.  But I guess I'll keep him anyway.