Gyudon is comfort food that shows up fast and hits hard: sweet-savory beef, silky onions, and rice that soaks up every last drop. This version goes a little luxe without getting fussy. We build the classic Japanese-style simmer sauce, then wake it up with a zesty, tangy finish using fresh citrus and a tiny bit of rice vinegar.
The result is the kind of bowl that makes you pause mid-bite and think, okay, wow. It is cozy, but not heavy. Rich, but still bright. And yes, it is weeknight-friendly, especially if your rice is ready when the skillet hits the heat.