Mix everything together and taste test to see what else you think it might need more of, it'll depend on if you like it with mild tastes or bold tastes. You may want to add more dried or toasted onions and onion powder to give it a more pronounced flavor. It also may need more salt, depending on how you like it. You really can't screw this up except by using too much salt, so just be careful with that part. Then cover and leave in the fridge for an hour or overnight so all the flavors come together nicely.