In a large bowl, mix tomato paste, vinegar, liquid aminos, Liquid Stevia, pepper flakes, and garlic powder.
Place wings in the bowl and coat well, then place wings flat on a cooking sheet covered in aluminum foil, dull side up, or parchment paper.
Bake wings for 35-40 minutes until browned and crisp, flip halfway through. If using the grill, cook on medium high heat for 20 minutes, turning the wings every 5 minutes until cooked all the way through.