マンチの犬～アンパンとカツ丼～

Detectives Kumegawa and Nakai, who both enjoy cooking and marijuana, are investigating a murder, when a suspect who appears to have gout surfaces. Although they had spotted the suspect based on his unnatural order history, he had a solid alibi. But the suspect is reluctant to talk, so they prepare katsudon to persuade him. What is the surprising recipe, which uses neither breadcrumbs nor warishita ..?