Preheat oven to 425°
For the POKE: Add all the poke ingredients EXCEPT tortillas, into a large bowl and mix gently. Marinate in the fridge for at least 20 minutes to a couple hours.
In another large bowl, add in the kale, olive oil, coconut aminos, lime juice, salt, pepper, cilantro, scallions, and mix well. Massage with hands to soften the kale leaves.
Spray the tortillas on each side with avocado spray and bake for about 3-4 minutes per side or until crispy.
In a bowl, mash the avocado with a fork and add in the lime juice, salt, and pepper. Set aside.
In another bowl, add all the ingredients for the sriracha mayo and set aside.
Assemble the tostadas by starting with a layer of the avocado spread, then the kale salad, and top with the ahi tuna. Drizzle with the sriracha mayo and top with more lime jiuce, radishes, and cilantro.