This is an easy dish that can be prepared in 30 minutes or less. Use skin-on fish fillets for the dish, because if the skin is removed, the fish is far more likely to fall apart as it’s stir-fried. The fish fillets should be at least 1.5cm (⅔ in) at the thickest point. Buy thick asparagus spears because they have a more satisfying bite than thinner spears.