Sour Mustard Greens Fish with Rich White Broth

Steps

1. 1
   Prepare a whole tilapia. Place the fish on a cutting board and carefully fillet both sides by cutting along the backbone, using a gentle sawing motion. Remove the central bone structure. Examine the fish fillets and remove any remaining small bones using your fingers or tweezers, ensuring the fillets are completely boneless.
2. 2
   Set aside the fish bones for making broth. Slice the scallion, ginger, and garlic. Prepare the pickled mustard greens (mustard variety is more traditional, though napa cabbage variant can also be used), cutting them into smaller pieces for easier cooking.
3. 3
   Bring a pot of water to a boil. In another pan, heat a small amount of oil with ginger slices and briefly pan-fry the fish bones until they begin to brown slightly. Once the bones are well-heated, quickly transfer them into the boiling water; the broth will immediately turn into a rich white color.
4. 4
   Add the first portion of pickled mustard greens to the fish broth to establish the sour base flavor. Season with salt and rice wine to taste, adjusting the seasoning as needed.
5. 5
   In a separate skillet, heat oil with ginger slices and gently pan-fry the fish fillets until they develop a light flavor and subtle crust. Add scallion and ginger first for aroma, then add garlic later to prevent it from becoming bitter.
6. 6
   Transfer the lightly pan-fried fish fillets along with the aromatic oils and seasonings from the skillet into the hot pickled vegetable and fish broth, allowing the fish to gently cook through in the broth.
7. 7
   Just before serving, add the remaining fresh pickled mustard greens and cook briefly to preserve their acidity and crispness. Garnish with scallion segments and drizzle with Sichuan peppercorn oil (or substitute with whole peppercorns or other peppercorn varieties) to add the signature numbing and spicy flavor. Serve immediately.