Cut the beef tenderloin into bite-sized pieces.
Blanch the fried tofu pouches in hot water to remove excess oil.
Cut the tofu into 2cm cubes.
Heat cooking oil in a pan and sauté the beef tenderloin.
When the beef is halfway cooked, add the tofu and tofu pouches and stir-fry.
Season with soy sauce and pepper, and continue to stir-fry until all ingredients are cooked through.
Serve on a plate to finish.