Preheat your oven to 375°F and line a baking sheet with parchment paper.
Cut the wonton wrappers into triangles and arrange them on the baking sheet, spraying lightly with a mist of avocado oil if desired.
Bake the wonton triangles for 5-7 minutes or until they are golden brown and crispy, then set aside to cool.
Using a sharp knife, dice the ahi tuna into uniform half-inch cubes and place them in a chilled mixing bowl.
In a small ramekin, whisk together the tamari, sesame oil, grated fresh ginger, sriracha, and sea salt.
Finely slice the green onion and dice the cucumber into small pieces.
Pour the marinade over the tuna, adding the green onion and cucumber, and toss gently to coat every piece.
Slice the avocado into thin wedges or small cubes.
Plate the zesty tuna mixture and top with the fresh avocado and a sprinkle of sesame seeds.
Serve immediately with the crispy wonton chips on the side for dipping.