Sushi
Sushi is a healthy meal choice, fish is high in omega 3 and rice is low in fat. It is a complete meal so a small sushi platter is always a good idea.(10-15 pieces)
However fish contains mercury, a heavy metal that the body is unable to eliminate, so it is advised to consume high mercury fish not more than 3 times a week.
Favor white fish and salmon.
P.S: Tempura are higher in fat as they are fried so stick to raw, marinated or grilled fish.