Prep pork and vegetables: Roughly chop pork shoulder. Chop the onion, potato, and zucchini. Slice chili pepper. Mince garlic.
Cook pork and onion. In a medium clay pot (or saucepan), heat 1 Tbsp oil over medium heat. Add pork and onion, stirring occassionally. Cook until onion is mostly soft, about 2 minutes. It's ok if the pork is not completely cooked through.
Add water + seasoning. Add water, doenjang, gochujang, and garlic. Add potato and any other hard vegetables (such as squash), if using. Bring to a boil then lower heat and simmer until potato is soft, about 5 minutes.
Add soft vegetables. Add zucchini and other soft vegetables (cabbage, bean sprouts, etc.), if using. Cook unti soft, about 3-4 minutes.
Add sliced tofu and chili pepper. Add tofu and chili pepper and simmer for 2-3 more minutes, until the tofu is heated through and all the flavors meld together. Spoon liquid over the tofu, if needed.
Garnish and enjoy. Sprinkle with green onion, drizzle of sesame oil, and sesame seeds. Serve hot with rice and kimchi. Enjoy!