Cut tofu into 1.5cm cubes.
Prepare minced beef, minced onion, and minced garlic.
Heat cooking oil in a pan and stir-fry the minced beef and garlic.
Add the onions and stir-fry together.
Add doubanjiang, gochujang, soy sauce, and sugar, then stir-fry.
Add the cubed tofu and water, then bring to a boil.
Finish with ground pepper and sesame oil.