Make Ahead

Easy Low-Fat Zucchini and Mushroom Gratin

June 17, 2010
4 Ratings
  • Serves 4
Author Notes

I used to follow a typical potato gratin recipe for many years. Then one day, I was out of potatoes. Plus, I was following a more stricter all natural diet and lower carbohydrate diet and I had zucchini on hand. Since this inception of the recipe, I have tried many variations of the recipe. This particular recipe is a fantastic variation. Tomatoes or another vegetable could be substituted for the mushrooms if not preferred. —amrecipes

What You'll Need
  • 5 medium Zucchini, thinly sliced
  • 1/2 cup grated Parmigiano Reggiano cheese
  • 1/2 cup grated Asiago cheese
  • 2 small onions, thinly sliced
  • 3 garlic cloves, crushed and minced
  • 1/2 sprig fresh rosemary
  • 1 teaspoon fresh ground pepper
  • 1 1/2 cups fat free, organic sour cream
  • 1 1/2 cups organic skim milk
  • 2 cups sliced baby bella or white mushrooms
  • 1/2 red bell pepper, cored and chopped
  • 8 ounces block fresh organic mozzarella cheese, thinly sliced
  1. Preheat oven to 350°F. Spray a 2-quart casserole dish with olive oil cooking spray.
  2. In a small saucepan on medium heat, simmer Parmesan and Asiago cheese, onions, garlic, rosemary, pepper, milk and sour cream for approx. 7 to 8 minutes. Stirring occasionally, until onions are almost translucent.
  3. In casserole dish, layer half zucchini slices, then half mushrooms and bell pepper. Pour in half onion and cream mixture; distributing onion evenly. Layer half slices of mozzarella. Repeat layers ending with a final layer of cheese.
  4. Bake for 30 minutes, until a golden crust has formed on top and the casserole is bubbling. Let sit for 10 minutes. Serve hot or warm.

See what other Food52ers are saying.

  • Amanda Hesser
    Amanda Hesser
  • Mvp222
  • thelastcourse

3 Reviews

Mvp222 April 9, 2020
This was good but had a soupy quality to it. Lots of liquid. Maybe I did something wrong. I was expecting more solid. Still good but needed a slotted spoon to serve.
I’d try it again but maybe without the milk?
thelastcourse June 18, 2010
Amanda H. June 19, 2010
As I have noted previously, your negative comments are not in the spirit of our site. We encourage discourse but it must be civil and constructive. Your comment is neither.