Esther Chois Dubu Jorim

Name: Esther Choi's Dubu Jorim
Ingredients: 1 14-ounce block extra-firm tofu; 4 tablespoons soy sauce, divided; 1/2 cup hot water; 6 dried shiitake mushrooms; 1 small onion, diced; 2 tablespoons vegetable oil, divided; 2 scallions, white and light green sections, chopped; 1 red chili pepper, minced; 2 cloves garlic, minced; 1 teaspoon ginger, grated; 2 tablespoons gochugaru; 1 teaspoon paprika; 1 tablespoon toasted sesame oil; 1 tablespoon sugar; 1 tablespoon mirin; 1 tablespoon toasted sesame seeds; steamed white rice, to serve