Vegan Kimchi Soup

Instant Pot:

1. Add oil to the Instant Pot. Press the sauté button. Press the adjustable temperature setting until it reads normal.Add diced potato, kimchi, gochugaru, gochujang (if using), garlic, ginger and salt to the pot. Stir together and cook 1-2 minutes, or until the spices become fragrant.
2. Slowly pour in the broth and the kimchi liquid. As you pour, scrape up any bits of vegetable stuck to the bottom of the pot (to prevent the burn warning). 
3. Press the cancel button. Set Instant Pot to pressure cook/manual, high pressure. Set the cook time for 2 minutes.The Instant Pot will take about 8-10 minutes to come to pressure, depending on how hot the soup is, and then will start counting down the cook time. (If the broth was hot when you added it, the Instant Pot will seal quickly.) The Instant Pot will beep to let you know the cook time has finished.Carefully quick-release the remaining pressure by using the handle of a long spoon (I use a wooden spoon) to turn the steam valve to venting.
4. Take the lid off the Instant Pot. Press the cancel button to end the cook cycle.Press the sauté button. Leave the adjustable temperature setting at normal. Optionally, mash the tofu cubes with a fork.Add the tofu, and simmer about 2 minutes, or until the tofu is warm.
5. Top soup with diced green onion and serve immediately along with rice.

Stovetop:

1. Heat oil over medium heat in a heavy-bottomed pot.Add diced potatoes, kimchi, gochugaru, gochujang (if using), garlic, and ginger to the pot. Stir together and cook 1-2 minutes, or until the spices become fragrant.Add the kimchi liquid and broth. Bring soup to a simmer, and continue to simmer for about 15 minutes.
2. Add the tofu, and simmer about 2 minutes, or until the tofu is warm.Top soup with diced green onion and serve immediately along with rice.