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Zucchini Pizza Casserole

I grow zucchini by the bushel, so this pizza casserole is one of my dinnertime go-to's. My hungry husband and kids gobble it right up. —Lynn Bernstetter, White Bear Lake, Minnesota
  • Total Time
    Prep: 20 min. Bake: 40 min.
  • Makes
    8 servings


  • 4 cups shredded unpeeled zucchini
  • 1/2 teaspoon salt
  • 2 large eggs
  • 1/2 cup grated Parmesan cheese
  • 2 cups shredded part-skim mozzarella cheese, divided
  • 1 cup shredded cheddar cheese, divided
  • 1 pound ground beef
  • 1/2 cup chopped onion
  • 1 can (15 ounces) Italian tomato sauce
  • 1 medium green or sweet red pepper, chopped


  • Preheat oven to 400°. Place zucchini in colander; sprinkle with salt. Let stand 10 minutes, then squeeze out moisture.
  • Combine zucchini with eggs, Parmesan and half of mozzarella and cheddar cheeses. Press into a greased 13x9-in. or 3-qt. baking dish. Bake 20 minutes.
  • Meanwhile, in a large saucepan, cook beef and onion over medium heat, crumbling beef, until meat is no longer pink; drain. Add tomato sauce; spoon over zucchini mixture. Sprinkle with remaining cheeses; add green pepper. Bake until heated through, about 20 minutes longer.
  • Freeze option: Cool baked casserole; cover and freeze. To use, partially thaw in refrigerator overnight. Remove from refrigerator 30 minutes before baking. Preheat oven to 350°. Unwrap casserole; reheat on a lower oven rack until heated through and a thermometer inserted in center reads 165°.

Test Kitchen Tips
  • Italian sausage or ground turkey sub well in this casserole.
  • Make it vegetarian by skipping the meat and increasing the veggies. Mushrooms or finely chopped cauliflower (or a combination of the two) taste great.
  • This packs up nicely for weekday lunches.
  • Nutrition Facts
    1 cup: 315 calories, 20g fat (10g saturated fat), 119mg cholesterol, 855mg sodium, 10g carbohydrate (4g sugars, 2g fiber), 25g protein.


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    Average Rating:
    • Barbara
      Jul 4, 2020

      This was really good.

      Jun 24, 2020

      This is our favorite main dish zucchini recipe! Just top it with whatever your favorite pizza toppings are if you want more flavor than the ground beef. I usually use the ground beef, onion, tomato sauce layer then might add some pepperoni, olives, sausage, additional onion, mushrooms......whatever I want on my pizza. Love it, love the results, not watery at all.

    • recipehound54
      Jun 21, 2020

      I knew from reading this recipe that it would be tasty. I am usually one of those review readers who does eye rolls when reading that the reviewer followed the recipe except for...then lists a long list of modifications. Well, I made some changes, too, and the outcome was great. I followed the process instructions as written. I used sweet Italian sausage instead of ground beef as I wanted a little zippier flavor, more pizza-like. I also added 1 tsp. of minced garlic after the sausage-onion mixture was browned (who doesn't like a little garlic in pizza?) My grocery store did not have Italian tomato sauce so I used regular and added 1 tsp. of Italian seasoning. Since the recipe called for either red or green pepper, I used half of a red pepper and half of a green pepper, giving the dish a colorful look. My husband was a bit skeptical until the first bite--then he was a convert. He raved about it and I do have to say, it was delicious. I had split the mixture into two casseroles with the idea of bake-one-freeze-one. I'll have to see how that goes next time I make it because we've plowed right into the next casserole the next night; leftovers were as delicious as the first night. I have strict instructions to make this dish again. ;)

    • kim
      Jun 6, 2020

      Made this last night for a potluck today. Everyone loved it-I work with lots of people on "Keto" and I was really glad to find something they could eat without needing to change anything! Just make sure you get the excess moisture out of the Zucchini, I layer mine on a cookie sheet and dried it out a bit (400 for 10 min) before I cooled and combined it with the egg and cheese) and you can get it firm without being too dry!

    • tammycookblogsbooks
      Dec 29, 2019

      This is tasty. I sliced my zucchini very thin instead of shredding it. I mixed it with the eggs, parm cheese, and half the other cheeses but didn't bake it until I added the remaining ingredients as listed.

    • gaylene2
      Oct 17, 2019

      A great way to use zucchini! Really good tasting. But our first question was, "Where is the crust?" The casserole baked up nicely and looked good, but we couldn't find a crust! My family said I should add noodles. I might add more flour. I added cut up ham and black olives instead of the hamburger and peppers. Yummy flavor.

    • kakjw
      Sep 18, 2019

      Excellent! Hubby had 3 helpings! The only addition I made was 1 tsp Italian seasoning. Next time I’ll try sausage, garlic

    • Jenny
      Sep 17, 2019

      Lynn's recipe was fantastic! My whole family loved a new dish, which I feel doesn't happen that often :) I forgot the red or green pepper, but it still tasted great. I added a little drizzle of olive oil to the zucchini part just before layering on the meat sauce. Really really delish--and easy.

    • Teresa
      Sep 17, 2019

      This is my favorite pizza recipe. I don't do bread and this smells so pizza awesome, I can't get enough!

      Sep 2, 2019

      Love this. I 'drain' zucc by spreading out large kitchen towel or two, cover with a couple layers of paper towel, then AFTER I've pushed all the liquid I can out through the colander, I spread the zucc on the towel layers and roll it up - TIGHT. May take a couple times, but it really does the trick and then your crust will be crisper. Also, my grandsons think pepperoni is a food group so we don't use beef or sausage - just spread pizza sauce over crust, put a think layer of pepperoni on this, then your cheeses and veggies. Sometimes bacon with the pepperoni (WHY NOT?!?!) After it's done everyone puts their own toppings on as desired. They love to help make it, too, so are happy to eat it :)