heat your pan over high heat, once hot add your clarified butter to the pan.
Season both sides of your tuna steaks then place then in the pan away from you so not to splash hot oil onto yourself. Sear for about 30-45 seconds per side until each side has a dark almost black crust. Remove immediately from the pan and rest for 1-2 minutes before slicing into thin strips.
Notes
Each portion is 4oz.Make sure the exhaust fan is on high and you have a window cracked because this method can create a lot of smoke. doing this outside is not a bad idea whenever possible.blackened tuna is great on its own or served with a dipping sauces like sugar free bbq, ranch, bleu cheese or honey mustard. I also serve it over salads or along side cauliflower mash or cauliflower rice.