Cut the tofu into bite-sized pieces.
Drain the oil from the canned tuna using a strainer.
Heat cooking oil in a pan and grill the tofu until golden brown.
Place the drained tuna on top of the grilled tofu.
Make the sauce by mixing soy sauce, sugar, and minced garlic.
Pour the sauce into the pan and stir-fry together with the other ingredients.
Top steamed rice with the stir-fried tofu and tuna mixture.
Finish with chopped green onion and a sprinkle of sesame seeds.