Combine all, and Refrigerate before using. I think it taste better if you give the spices time to marry.
It is really good on croissants rolls. You can also double the recipe for a double batch if you serving them for a larger crowd.
These are really handy for lunches & parties. I also take them to families that are in bereavement. All they have to do is put them in the fridge and eat them when they feel like eating. This will also save longer because it doesn't have mayonnaise in them.