In a medium sized bowl add the black bean chili sauce, black vinegar, tamari, ginger, garlic, water and ground Szechuan peppercorns to make the spicy black bean sauce
Heat a large wok over medium-high heat and add a tablespoon of sesame oil.
When the oil is heated, add the tofu to the pan and stir fry for 3-5 minutes, or until the outside of the tofu begins to crisp a bit.
Add the eggplant to the wok and continue to stirfry another 5-8 minutes. The eggplant should have softened, but not be fully cooked.
Add the spicy black bean sauce and the chopped green onions to the wok and toss to coat.
Stirfry for another 2-3 minutes until the sauce cooks in to the eggplant and tofu then serve.