Bluefin tuna or yellowfin sushi grade tuna (Ahi) can be used for this recipe.
Prior to cut into dices, place tuna in the freezer for about 90 minutes. Season with Black Opus olive oil and refrigerate. Cut avocado into dices and season with lime juice, salt, and cayenne to taste; refrigerate.
Slice out shallots and toss in flour. Shake off excess flour and fry. Transfer fried shallots onto a baking tray lined with paper towel.
Place individual cake rings on plate. Create a layer of diced avocado and fill up with the seasoned tuna and garnish with fried shallots. Remove pastry ring and top with arugula sprouts, and a drizzle of tamari sauce. Serve with potato chips, or toasted baguette slices. Enjoy!