Try this homemade Rainbow Squash Casserole recipe the whole family will love. Made with white squash, zucchini, yellow squash and red onions. Easy step-…
This Rainbow Squash Casserole relies on simple, everyday ingredients such as medium white squash, medium zucchini, to 6 small yellow squash and medium red onions. It comes together quickly and makes 4 servings, at about 51 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