Heat the sesame oil in a large pot over high heat until it ripples.
Add the onions and garlic and cook, stirring, until brown, 3 to 5 minutes.
Add the cabbage and continue to brown for an additional 3 to 5 minutes.
Add the vegetable stock, kimchi with its juice, tamari, gochujang, and sugar and simmer for 15 minutes, stirring often.
Server in bowls, garnished with scallions and daikon