Try this homemade Maryann'S Fish Casserole Supreme recipe the whole family will love. Made with crackers, frozen spinach, mushrooms and fish. Easy step-…
This Maryann'S Fish Casserole Supreme relies on simple, everyday ingredients such as approximately 20 crackers, (10 oz.) pkg. frozen spinach, (8 oz.) can mushrooms and pt. heavy cream. It comes together quickly and makes 4 servings, at about 60 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