Drain the canned tuna lightly, leaving a bit of oil, and place it in a bowl.

Finely chop the vegetables (onion, zucchini, green onion, carrot) as you would for fried rice.

Stir-fry the vegetables in the order of carrot, zucchini, onion, and green onion. Spread them out in a large bowl to cool.

Blend frozen bread into breadcrumbs using a mixer. Alternatively, use store-bought breadcrumbs.

Mix ketchup, corn syrup, soy sauce, and vinegar to create the steak sauce.

Combine the drained tuna, stir-fried vegetables, minced garlic, and egg in a bowl.

Gradually add breadcrumbs while kneading the mixture until it reaches a sticky consistency. Add salt and pepper to taste.

Shape the mixture into patties of your desired size. One canned tuna typically makes about six small patties.

Heat a pan with cooking oil and carefully fry the patties until golden brown on both sides.

For the steak sauce, sauté onion in the pan, then pour the sauce mixture and simmer until thickened.