Try this homemade Leftover potatoes au gratin recipe the whole family will love. Made with potatoes, egg, champignons and salt. Easy step-by-step instru…
This Leftover potatoes au gratin relies on simple, everyday ingredients such as egg, champignons, salt and pepper and cheese. It comes together quickly and makes 4 servings, at about 398 kcal each. The step-by-step instructions below are written to be easy to follow, even on a busy day.
It's versatile enough for an easy weeknight dinner yet satisfying enough for guests at the weekend. Serve it with your favorite sides, and keep any leftovers for a quick meal the next day.
Updated Jun 30, 2026