1 pound skinless salmon fillet, halved crosswise
2 teaspoons curry powder, preferably hot
Kosher salt and freshly ground pepper
8 tablespoons store-bought tartar sauce
1/4 cup cracker meal or crushed saltines, plus more for sprinkling
2 tablespoons grated peeled ginger
1 bunch scallions, finely chopped
1 large egg, lightly beaten
1/2 red bell pepper, seeded and diced
2 stalks celery, thinly sliced
1 mango, peeled, pitted and diced
Juice of 1 lime
Vegetable oil, for frying