Vegan Gyoza

Name: Vegan Gyoza
Ingredients: 1 pacakge firm tofu frozen, thawed, washed; 1/2 cup quinoa; 200 grams cabbage (7 ounces); 4 scallions minced; 2 large cloves garlic grated; 1 inch knob ginger (about 1 tablespoon); 2 tablespoons sesame oil; 1 tablespoons soy sauce; 1 tablespoon sake; 1 tablespoon potato starch; 1 teaspoon salt; 1/4 teaspoon white pepper; 2 dried shiitake mushrooms; 40 gyoza wrappers (a.k.a. potsticker wrappers); vegetable for frying; 2 tablespoons soy sauce; 2 tablespoons rice vinegar; chili oil (optional)