Place Ttukbaegi Pot (or a thick-bottomed pot) on medium-high heat. Add-in the bacon. Stir it around until the bacon gets a slight browning on the edges. Then add-in the frozen green beans. Stir-fry everything around for 1 minute. Then important - TURN OFF THE HEAT! (We don't want the Ttukbaegi pot to get too hot - or else it could crack when adding in cold water). Afterwards, add-in the washed rice (1 cup). Then add in warm water (1 cup).
Next, add your toppings to the rice: place the thinly sliced sweet potatoes, shiitake mushroom and bacon on top of the rice. Turn the heat back onto a HIGH heat. Put the lid on and wait until it comes up to boil. Once it's boiling, set a timer for 3 minutes.
After 3 minutes, reduce the heat to a LOW. Then set a timer for 10 minutes and let it cook.
After 10 minutes, take the pot off the heat and place it on a coaster. Give it 2-3 minutes to steam by itself in its residual heat.
It's ready to eat. Serve into individual bowls and enjoy! (Optional: You can add a dab of butter and a drizzle of soy sauce if you want to season the rice)