For the chermoula: toast and crush the cumin seeds. Juice the lemon. Place all of the chermoula ingredients in a food processor and pulse to give a rough paste.
Spread the chermoula on both sides of each tuna steak.
Heat a frying pan and add olive oil. Add the tuna steaks to the pan and cook for 2-3 minutes on each side depending on thickness.
«Do not overcook your tuna, it should be pink in the middle. Always buy line or pole caught tuna.»