Asian Sesame Grilled Tuna Steak (This was so delicious we couldn't believe it was tuna! Such a simple recipe and even people who don't like fish would probably love this! We substituted the sesame seeds for flax seeds.) sub soy sauce for coconut aminos.
Marinated Tuna Steak Recipe - Definately reduce the cooking time though unless you want your tuna cooked all the way through. I like mine a bit rarer so only cooked for about 4 minutes total.probably could get away with 3 minutes really.