Crispy Catfish Raft with Green Apple

Name: Crispy Catfish Raft with Green Apple
Ingredients: 1/4 cup (60 milliliters) fish sauce; 1/4 cup (60 milliliters) fresh lime juice; 1/4 cup (60 grams) palm sugar or brown sugar; 1 clove garlic, minced; 1 to 2 Thai chiles, minced; 1 pound (454 grams) catfish fillet; 2 teaspoons kosher salt; Freshly ground black pepper; 3 tablespoons olive oil, or as needed; 1/2 cup panko breadcrumbs; High-heat cooking oil, such as vegetable or canola oil, for frying; 1 cup (150 grams) julienned green apple; 1/2 cup Chinese celery or regular celery leaves, cut into 2-inch pieces; 1/2 cup (65 grams) roasted cashews or peanuts, roughly chopped