There are as many variations on this as there are days in the year. I suggest you troll about on the Interweb to see what some of the other recipes look like. This stuff is pretty much good on anything.
1 cup shelled walnuts
4 whole dried chiles (or fresh)
1/2 c yogurt
1/4 t garam masala
1/2 t salt
1t powdered sugar
In food processor, grind walnuts and chiles to a paste. Add the rest of the ingredients and process for about a minute. One of those little food processors works best if you are making a single batch.