Ingredients (all approximate, the secret to this sauce is really just chucking things in and tasting as you go):
1/2 cup whole egg mayonnaise
3 tbl tomato sauce
3 tbl sweet gherkin relish
3 tbl finely diced brown onion
2 tsp smoked paprika
Glug of hot sauce (we like Mister Toast jalapeño sauce from Marrickville Markets or Old Bones Smoked Garlic Extra Hot)
1 tsp white vinegar
Juice of half a lemon
Salt to taste
Directions: Mix together. Grill burger. Smother. Drip everywhere. Burp contentedly.