"This is the Korean equivalent of chicken noodle soup - it is a comforting, cure-all soup. It is also spicy and fresh, and easy to make. You will have to visit your local Asian market for some of the ingredients."
Pour the beef stock into a stock pot or large deep skillet over medium-high heat. Stir in the toenjang until dissolved. Add the kelp and garlic, and bring to a boil. Put in the tofu, cabbage, daikon and yellow squash, cover and return to a boil. Cook gently for 5 minutes. Then add the green onions and hot pepper, and boil for a minute, or until the onion and pepper become fragrant and brightly colored. Limit the cooking time to no more than 15 minutes. Remove and discard kelp. Serve immediately.