Peel and chop 3 potatoes, 1/2 onion, and 1/2 zucchini into bite-sized pieces.

Add the chopped vegetables and 2 cans of spicy tuna into a pot.

Add 1 tbsp gochujang, 3 tbsp chili powder, 4 tbsp soy sauce, 1 tbsp sugar, and 1 tbsp minced garlic to the pot.

Pour 400ml of water into the pot, ensuring the ingredients are submerged.

Bring the pot to a boil over high heat, then reduce to medium heat and simmer for 15 minutes.

Check the consistency and adjust with more water or gochujang as needed.