Marie Rose Sauce

In quantities suitable for the amount of sauce you need:

2 parts mayonnaise
1 part ketchup
lemon juice
salt

to your taste, you may also include (maybe not all at once, tho?):
grated onion
finely chopped scallion
Worcestershire sauce
Tabasco (or other hot sauce, to your taste)
black pepper
crushed red pepper
a pinch of sugar
brandy(!!)
grated horseradish