kimchi • 12 1/2 oz (350 g) package extra-firm tofu • cornstarch • salt, plus more for seasoning • white pepper, plus more for seasoning • vegetable oil divided • dark soy sauce • gochujang paste (use vegan-friendly option if desired) • cooked quinoa, cooled • edamame, thawed and drained if frozen • green onions, white parts thickly sliced and green parts julienned, divided • white vinegar •