Cut the tofu into bite-sized pieces.
Drain the oil from the canned tuna and set aside.
Thinly slice the onion, spicy green chili, and green onion.
Heat cooking oil in a pan and grill the tofu until golden brown on both sides.
In a pot, layer the grilled tofu, then top with tuna and vegetables.
Mix together soy sauce, chili powder, minced garlic, sugar, and water to make the sauce.
Pour the sauce over the tofu and tuna.
Simmer over medium heat until the sauce thickens and the tofu absorbs the flavors.