This kimchi jjigae comes together quickly but delivers deep, complex flavors. The key is using well-fermented kimchi, which provides the characteristic tangy and umami notes that make this stew so satisfying. Don't rush the simmering process, as this allows all the flavors to meld beautifully.

1. Step 1: Cook the pork until it begins to render fat

   In a medium pot or Korean earthenware pot (ttukbaegi), add the sliced pork belly and cook over medium heat until it begins to render its fat, about 2-3 minutes.

2. Step 2: Sauté the aromatics until fragrant

   Add the sliced onion, white parts of green onions, and minced garlic. Sauté until fragrant and the onions begin to soften, about 2 minutes.

3. Step 3: Stir-fry the kimchi until aromatic

   Add the chopped kimchi and stir-fry for 2-3 minutes until it begins to soften and becomes aromatic.

4. Step 4: Add Korean seasonings and stir well

   Add gochugaru, gochujang, and soy sauce. Stir well to combine all ingredients and cook for another minute to allow the flavors to meld.

5. Step 5: Simmer the stew to develop flavors

   Pour in the water and bring the mixture to a boil. Once boiling, reduce the heat to medium-low and simmer for 10 minutes, allowing the flavors to develop.

6. Step 6: Add tofu and simmer until heated

   Gently add the tofu cubes, being careful not to break them. Continue to simmer for another 5 minutes until the tofu is heated through.

7. Step 7: Adjust seasoning to taste

   Taste the stew and adjust seasoning with salt and sugar if needed. The stew should have a balanced tangy, spicy, and slightly sweet flavor.

8. Step 8: Finish with sesame oil and green onions

   Drizzle with sesame oil and sprinkle with the green parts of the green onions just before serving.

9. Step 9: Serve hot with rice

   Serve hot in individual bowls with a side of steamed rice.

For an authentic Korean meal experience, serve this jjigae with banchan (small side dishes) like pickled vegetables or seasoned spinach. The stew tastes even better the next day as the flavors continue to develop, so don't hesitate to make extra!