Add half of the sugar and salt to the bottom of a baking dish (or any glass or ceramic dish) Place fish on top and the other half of the salt and sugar and the rest of the ingredients on top of the fish. Place plastic wrap on top and something very heavy on top that will press the fish down (a large brick is ideal but you can use a pot with water inside) Let sit in fridge for 2-4 days. Rinse off fish and slice thinly.