Method

• First spreadthe yoghurt into a large platter and spread it out in a circle around the plate
• Put the onion, chili pepper and olive oil into a pan and fry for three minutes. Set aside.
• Put the sunflower oil into a heavy pan over a high heat. Season the tuna with salt and pepper then place in the hot pan and fry for two minutes, turning and searing on all sides for the same time.
• Put the tuna into a bowl and add the olive oil and onions and mix gently.
• Place the tuna on the yoghurt and scatter with chopped coriander.
• Serve immediately.