Special Sauce

I'm not kidding, this is what this yummy sauce is called!

It was fantastic on a cheeseburger tonight.  I whipped it up with what I have in the kitchen, and I did not have adobo sauce or celery salt.  It was delicious without it.  [Now I make it with celery seeds, which adds a wonderful flavor without salt]

It comes from the June 2011 issue of Bon Appetit.

Special Sauce

1/2 cup mayo
2 Tbsp ketchup
1 Tbsp finely grated onion (unless you love onions, I'd half this next time OR use a Vidalia onion instead*)
1 Tbsp sweet or dill pickle relish
2 tsp adobo sauce from canned chipotle chilies in adobo [I skipped this]
1/8 tsp celery salt [I use celery seeds instead]
1/8 tsp kosher salt

Combine ingredients in a medium bowl and serve with burgers.

* It occurred to me last night that this sauce would be FANTASTIC if you finely chopped the onions instead of grating them and carmelized them first.  YUM!  [That's the only way I make it now!!]