To a bowl add the tamari, Keto hoisin sauce, hot sauce, chili flakes, stevia drops, rice vinegar, and xanthan gum. Whisk to combine. Set the sauce aside.
Wrap the tofu block in a clean kitchen towel, and squeeze to release excess moisture. Cut the tofu into small ½” cubes and place them in another bowl. Sprinkle the coconut flour and toss to coat.
Pour 1 tbsp of oil into a nonstick pan over medium-high heat. Add the tofu pieces in one layer and cook for 4-5 minutes per side until golden. Transfer the tofu to a plate.
Grate the garlic and ginger and finely chop the onion and green chili. Add 1 tbsp of oil to the same pan and place it over medium heat, then add the garlic, ginger, onion, and green chili. Cook for 30 seconds until fragrant
Add the sauce to the pan and bring to a simmer. Place the tofu pieces back in the pan and let everything cook together for 2-3 minutes, or until the sauce is thick and sticking to the tofu. Take the pan off the heat.
To serve, add cauliflower rice at the bottom of a bowl, and top it with 1/2 of the spicy garlic tofu. Garnish with sliced scallions and sesame seeds. Serve immediately.