This video shows you how to make tuna tartare with toasted cashews, fresh ginger, red onions, minced serrano chiles, lime juice, and the secret ingredient, coconut milk. You’ll see how to properly dice up the sushi-grade tuna.This is a basic technique for tuna tartare. This particular recipe has an Asian flare, but feel free to take it in any direction you want: Mediterranean, Latin, whatever you like. Whatever you do, serve immediately. Watch the video, then check out Chef John's recipe for Coconut Cashew Tuna Tartare. Enjoy with taro chips, fried wonton chips, or sweet potato chips.