Place the prepared ingredients in a large, shallow pot. (For reference, I laid down onion and kimchi at the bottom of the pot, then arranged the remaining ingredients on top in sections.) Boil the pot over medium-high heat until it reaches a rapid boil, then reduce the heat to medium-low to low. Start serving the dish as individual ingredients become ready. You may turn off the heat when ready. Serve with steamed rice. Additional side dishes aren't necessary, but you're welcome to serve it with popular Korean sides such as kimchi, Korean egg roll, or roasted seaweed if desired.