Try this homemade Spaghetti Squash Casserole Bake recipe the whole family will love. Made with butter, mushrooms, onion and garlic. Easy step-by-step in…
This Spaghetti Squash Casserole Bake relies on simple, everyday ingredients such as butter, sliced fresh mushrooms, large onion, chopped and garlic cloves, minced. It comes together quickly and makes 4 servings, at about 268 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