Place the tuna in a ziploc bag, add 30 ml of the oil, 10 ml of the curry powder and allow to marinade.
In the meantime, Add the other 15 ml oil to a pan with the curry powder. Add the onions and saute until soft.
Add the vinegar, sultanas and sugar/sweetener and cook for about 5 minutes. Keep the onion until needed.
Clean your pan and then heat it again. Place the marinated tuna in the hot pan and cook to your liking. Season with salt and pepper.
When you are ready to serve, place some lettuce leaves in a plate, place the tuna steak on the salad leaves and then top with a dollop of yogurt, some of the onion relish and fresh coriander on top and serve as a light lunch or starter.Recipe reprinted with permission of Nina'sKitchen. To see more recipes, click here.