Mapo Tofu with Pork

Name: Mapo Tofu with Pork
Ingredients: One 14-ounce package firm tofu, chopped into 1/2-inch cubes; Kosher salt; 3/4 cup low-sodium chicken stock or water; 1 tablespoon light brown sugar; 1 tablespoon cornstarch; 1 tablespoon toasted sesame oil; 1 1/2 tablespoons soy sauce; 2 tablespoons black bean garlic sauce; 2 to 3 tablespoons gochujang (2 will be spicy, 3 will be really spicy); 1 tablespoon vegetable oil; 1 pound ground pork; 3 garlic cloves, finely chopped; One 1-inch piece fresh ginger, peeled and finely chopped (about 2 tablespoons); 4 scallions, chopped, white and green parts separated; 2 teaspoons ground Sichuan peppercorns (or 2 teaspoons ground black pepper and 1/2 teaspoon ground coriander); White rice, for serving