Heat up a medium to large size pot and add the sesame oil (1 tbsp). Once hot, add the onion (1/2) and garlic (3) and allow to caramelize. And mushrooms??
Add kimchi, tomatoes, and chili paste (1 tbsp). Stir and let cook for a few minutes.
Add in vegetable stock (2 cups) and bring to a boil.
Add in the soft tofu and break it into pieces with a spoon. Let the stew cook and simmer for 10-15 minutes to let the tofu absorb all of the flavors!