Try this homemade Spaghetti Squash Au Gratin recipe the whole family will love. Made with butter, yellow onion, red pepper and thyme. Easy step-by-step …
This Spaghetti Squash Au Gratin relies on simple, everyday ingredients such as medium spaghetti squash, butter, red pepper flakes (or more) and fresh thyme. It comes together quickly and makes 4 servings, at about 172 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