[Yuuri blushes, expression brightening at the praise even.]

Um, yeah, my mom's katsudon is the best. I've tried katsudon in other places before, but I haven't found one that I liked more than hers. [He shifts happily in his seat.] I'm glad you like it so much. I wouldn't mind cooking it for you, whenever you feel like having it again.

[If that wasn't obvious enough already.]