We are going to start out by dicing our ingredients for the tuna tartare. This has to sit for at least 30 minutes, but an hour is preferred to develop great flavors. So….dice your tuna, green onions, ginger (or even do the squeeze ginger to save time), jalapeño pepper, and toss into a bowl. Also, add tamari sauce, sesame seeds, and finally sesame oil to the tuna bowl. Give a good stir, cover with plastic cling, and refrigerate for 1 hour.