Steps
1. Cut the tofu into small cubes and set aside.
2. Heat the vegetable oil in a pan over medium heat, then add Szechuan peppercorns and stir-fry for about 30 seconds until fragrant.
3. Add minced garlic and ginger, cooking for another minute.
4. Stir in Doubanjiang, soy sauce, and sugar, cooking for 1-2 minutes.
5. Pour in the vegetable broth, bring to a simmer, then add the tofu cubes gently.
6. Cook for 5 minutes, allowing the tofu to absorb the flavors.
7. Stir in the cornstarch mixture to thicken the sauce, cooking for an additional 2 minutes.
8. Season with salt to taste and garnish with chopped green onions before serving.