Cut the fish fillets into bite-sized square pieces that are about 0.5 inches thick.
Cut ¾ of the dill into pieces and mince the remaining dill leaves. Cut the green part of the scallions into bite-sized pieces and julienne the white stalks.
Mince the shallots, garlic, and lemongrass. Remove the chili peppers' stems. Cut the peppers into thin slices. Puree and filter the cơm mẻ if needed.Wash the galangal roots, then crush or grind them. Save 1 tablespoon of ground galangal. Squeeze the juice out. Clean the turmeric and crush or grind them. Squeeze out the turmeric juice. Season the fish with minced dill, lemongrass, shallots, garlic, galangal juice, shrimp paste, fermented rice, turmeric juice, salt, sugar, pepper, and ground galangal.Mix well and marinate for 1 hour in a refrigerator. Blanch the noodles in boiling water with a little cooking oil.Put them in a bowl of cold water then drain them. Mix shrimp paste with sugar and kumquat juice. Stir well until you see small bubbles in the sauce. Then, add the minced garlic and sliced chili.
Line a baking tray with aluminum foil. Brush a thin layer of oil on the foil.Place the marinated fish in the lined tray. Preheat your oven to 390 degrees F. Bake the fish at that temperature for 15 minutes.
Take the fish out of the oven and check their doneness.
Place a pan on the stove and heat some cooking oil or fat. When the oil is heated, add the baked fish and fry them until golden brown on both sides.
Next, add the scallions (both leaves and stems) and dill to the pan. Stir gently for 30 seconds.
Turn the heat to the lowest level to keep the fish hot while eating. You can also turn off the heat but keep the pan on the stovetop.
Enjoy with noodles and sauce.