Eating fish once or twice a week may reduce the risk of diseases ranging from childhood asthma to prostate cancer. Fish is an excellent source of omega-3 fatty acids. Fish is low in fat and high in protein. Eating fish during pregnancy may reduce the risk of a premature baby. Healthy ways to enjoy fish include baked, poached, grilled and steamed. Some fish contain high levels of mercury and should be eaten rarely or not at all.
Put the spring onions on the bottom of the steamer tray and put the fish
on top, season with lemon slices, chilli and ginger, cover with a tight
fitting lid, sit over a pan of simmering water, steam for 6-8 minutes,
until fish is opaque and cooked. Heat vinegar and hoisin sauce in a pan
and pour in a small bowl, serve with fish.