Try this homemade Squash Au Gratin recipe the whole family will love. Made with onion, egg, salt and butter. Easy step-by-step instructions included.
This Squash Au Gratin relies on simple, everyday ingredients such as sliced summer squash, chopped onion, medium egg and salt and pepper to taste. It comes together quickly and makes 4 servings, at about 88 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