To make the burger sauce, in a bowl add 100g of light mayonnaise, 20g of gherkin relish or sweet relish, 1 Tbsp of pickle juice, 15g of mustard, 1 tsp of vinegar, 2 tsp of smoked paprika, 1 tsp of garlic powder and 1 tsp of onion powder. Mix well to combine. (Not all of this sauce gets used - store the rest in the fridge.)