Barley Tofu With Garlicky Chili Oil

Name: Barley Tofu With Garlicky Chili Oil
Ingredients: Barley tofu; 3/4 cup (100 grams) barley flour; 1 3/4 cups (375 grams). water; 1 teaspoon kosher salt; Neutral oil, for frying; Chili oil; 8 dried red chili peppers; 1 tablespoon whole red Sichuan peppercorns; 2 teaspoons whole white peppercorns; 1 2-inch knob of ginger, peeled and minced; 3 stalks scallion, stemmed and minced; 5 cloves garlic, peeled and minced; 1 cup neutral oil; Kosher salt, to taste; White sugar, to taste; White vinegar, to taste; Fish sauce, to taste (optional)