This is REALLY easy, so I'm not even going to quote the ingredients. Just mix all of these together. Be warned, this is somewhat fattening, but hey, what isnt?
5 tablespoons mayonnaise, it can be low fat if you want.
1 tablespoon tomato ketchup or thick tomato puree
1 tablespoon Worcestershire sauce
1 tablespoon lemon juice
1 teaspoon finely chopped onion
1 teaspoon finely chopped celery
Salt, depending on what kind of taste you want. Increase by half a teaspoon each time.
Now, if you don't have celery, you can use 1/4 teaspoon celery salt instead.