Drain the firm tofu and cut into 1-inch cubes.
In a dry wok or large skillet over medium heat, toast the Sichuan peppercorns until fragrant, then grind them into a fine powder using a mortar and pestle.
Increase heat to medium-high and add the avocado oil to the wok.
Add the ground turkey, breaking it up with a spatula and browning it until fully cooked.
Stir in the minced garlic, grated ginger, and fermented bean paste, sautéing for 1 minute until the oil turns red and aromatic.
Pour in the chicken bone broth, tamari, and ground peppercorns, bringing the mixture to a gentle simmer.
Carefully slide the tofu cubes into the sauce, tossing gently to coat without breaking the tofu.
In a small bowl, whisk the arrowroot powder and water to create a slurry, then pour it into the wok.
Stir gently as the sauce thickens to a glossy consistency.
Drizzle with chili oil and garnish with thinly sliced green onions before serving warm.