Remove excess moisture from the tofu and cut it into bite-sized pieces.
Drain the oil from the tuna using a strainer.
In a bowl, mix soybean paste, gochujang, minced garlic, chopped green onion, sesame oil, tuna, and sesame seeds together.
Heat a pan over low heat and lightly stir-fry the prepared ssamjang mixture.
Serve by placing the ssamjang on top of the tofu pieces.