Place fresh mussels in a bowl. Sprinkle salt over the mussels, then pour enough water to cover. Let it stand for 20 minutes.
4 pounds fresh mussels, 1 teaspoon rock salt, Water
Place the mussels in a wok or deep pan. Pour 1 cup of water and add the ginger. Cover with lid and turn on the heat to medium. Cook until the mussels open up.
1 thumb ginger, 1 cup water
Remove the pan from heat and let them cool down enough to handle. Reserve the liquid. Take a pair of a shell and use this to pinch and pull the meat out of the shells. You can also use tongs. Remove the “beard’ from the mussels, if any. Set aside
Heat oil in a wok or pan over medium heat. Saute onion and garlic until lightly browned and aromatic.
3 tablespoons oil, 1 medium yellow onion, ½ head garlic
Add vinegar, soy sauce, ¼ cup of the reserved broth, bay leaves, and peppercorn. Let it simmer for 5 minutes without stirring.
¼ cup vinegar, ¼ cup soy sauce, 2 pieces bay leaves, ¼ teaspoon peppercorn
Stir in the cooked mussels, brown sugar, butter, and chili. Cook for another 5 minutes or until the sauce has thickened.
1 teaspoon brown sugar, 1-2 tablespoon butter, 2 pieces chili labuyo
Turn the heat off and transfer to a serving dish.