Try this homemade Onion Potato Gratin recipe the whole family will love. Made with potatoes, onion, salt and nonfat cooking spray. Easy step-by-step ins…
This Onion Potato Gratin relies on simple, everyday ingredients such as large potatoes, sliced thin, onion, sliced thin, salt & pepper and half-and-half. It comes together quickly and makes 4 servings, at about 339 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