Quick Tarter Sauce

I like fish sticks. The kind in the cardboard box in the freezer section. You can't eat these without tarter sauce. I can not bring myself to pay for it so I make my own. I make a quick version. I mix mayo with sweet pickle relish adding just a little sugar. Quick and easy is the only way. If you look online the recipe calls for parsley, capers,and lemon juice. To much for me. My quick version suits me just fine. HQow do you make hour tatter sauce?