Try this homemade Flounder Au Gratin With Mushrooms recipe the whole family will love. Made with fresh flounder, fresh mushrooms, butter and lemon juice…
This Flounder Au Gratin With Mushrooms relies on simple, everyday ingredients such as fresh mushrooms, sliced, butter, fresh lemon juice and chopped parsley. It comes together quickly and makes 4 servings, at about 222 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