Cream Dory Ceviche (Kinilaw na Cream Dory)

Ingredients:
1 kilo pangasius fillet (cream dory), cut into bite size pieces
2 cups vinegar (or more to keep fish properly soaked)
1 thumb-size ginger, peeled and finely chopped
1 medium red onion, finely chopped
2 tbsp. chopped spring onions
2 tbsp. lemon or calamansi juice
2 tbsp. sugar
a dash of salt and ground black pepper

Procedure:
1. Pour vinegar on a bowl of cleaned raw fish, toss generously to make sure it is properly soaked in vinegar. Cover the bowl with plastic film wrap and let it stand for 1 hour.
2. Prepare chopped ingredients for garnish/ kinilaw mix.
3. After an hour, strain soaked fish and discard used vinegar.  Transfer fish on a mixing bowl and add the chopped ingredients. Mix well and pour in lemon or calamansi juice. Season with sugar, salt and pepper.
4. Chill and serve.