Drizzle the tuna with half of the lime juice. To let go. Preheat the oven to 150 degrees.
Puree the bananas with the remaining lime juice. Add the fish sauce. Cut spring onions into slices, dice ginger and stew in oil. Then add the banana puree and curry. Bring to a boil. Now add the coconut cream and continue cooking until a creamy sauce is formed. Season to taste with pepper.
Finely chop the coriander leaves. When the sauce is ready, pour it into a flat baking dish and sprinkle with the coriander leaves. Place the tuna steaks on top. Now put in the oven for approx. 15 minutes. Turn the steaks halfway through.