Weeknight Mapo Tofu with Ground Pork

Name: Weeknight Mapo Tofu with Ground Pork
Ingredients: 2 tablespoons vegetable oil; 8 ounces ground pork; 1 jalapeño, thinly sliced; 4 garlic cloves, sliced; 1 1½-inch piece ginger, peeled, finely chopped; 4 scallions, chopped, plus more for serving; 1 tablespoon tomato paste; 1 teaspoon ground Sichuan peppercorns or freshly ground black pepper; 2 cups low-sodium chicken broth; 3 tablespoons Chinese black bean garlic sauce; 1 tablespoon cornstarch; 1 pound silken tofu, drained, cut into 1-inch pieces; Torn basil leaves and steamed white rice (for serving)