- 2 tablespoons fresh lime juice
- 1 tablespoon fish sauce (such as nam pla or nuoc nam)
- 1 teaspoon sugar
- 4 tablespoons vegetable oil, divided
- 4 6-ounce skin-on Chilean sea bass or halibut fillets
- Kosher salt
- 2 medium shallots, thinly sliced into rings
- 1 1″ piece ginger, peeled, finely julienned
- 2 scallions, thinly sliced
- 2 small green Thai chiles or 1/2 jalapeño, thinly sliced into rounds, seeds removed
- 2 garlic cloves, finely chopped
- 1/4 cup chopped fresh mint, basil, and/or cilantro
- 2 tablespoons chopped unsalted, dry-roasted peanuts
- 2 tablespoons chopped fresh dill
- Preheat oven to 350°F. Whisk lime juice, fish sauce, sugar, and 2 tablespoons water in a small bowl until sugar is dissolved. Set lime juice mixture aside.
- Heat 2 tablespoons oil in a large ovenproof skillet over medium-high heat. Season fish with salt and cook, skin side down, until skin is golden brown and crisp, 5–8 minutes. Transfer skillet to oven and roast until fish is just opaque in the center, 5–10 minutes longer, depending on thickness. Transfer fish to a plate.
- While fish is roasting, heat remaining 2 tablespoons oil in another large skillet over medium-high heat. Add shallots, ginger, scallions, and chiles and cook, stirring often, until beginning to brown, about 3 minutes. Add garlic and cook, stirring, until golden brown, about 30 seconds. Add reserved lime juice mixture to skillet and cook, stirring, until slightly reduced, about 1 minute. Remove from heat and mix in herbs and peanuts. Serve fish topped with sauce and dill.