Spinach and Zucchini Lasagna Recipe

This spinach and zucchini lasagna is vegetarian, low-carb, and gluten-free. It is made with tomato sauce, skinny ricotta, mozzarella, and zucchini noodles.

This post for Spinach and Zucchini Lasagna first appeared on September 3, 2014. I updated it with new photos and more information about the recipe on June 19, 2018. 

This low-carb Spinach and Zucchini Lasagna recipe has become one of the most popular recipes on my site over the years. I first published this low-carb Spinach and Zucchini Lasagna four years ago, and since then, my readers have baked it and given great reviews. I still make it often since my husband loves this Spinach and Zucchini Lasagna recipe. This recipe is great because instead of using traditional noodles, you use zucchini noodles, which make this recipe low-carb and gluten-free yet very flavourful.

Since this low-carb Spinach and Zucchini Lasagna is such a popular recipe on my site, I decided to update this post with new pictures and a photo tutorial about how to make this guilt-free lasagna recipe better serve you – my reader. I hope you like it!

Spinach and Zucchini Lasagna Primavera Kitchen Recipe

Hello everyone. First, I would like to thank you for all your good wishes I received after my last post when I was talking about my sciatic nerve pain. The good news is I am almost 100% better. My husband’s massages helped me a lot and so did the yoga exercises, which I am not going to give up anymore. Nothing in life is more important than your health. So, don’t stop exercising because it is essential for a healthy body, life, and soul. 😉

That being said, why not celebrate health with this delicious and skinny spinach and zucchini lasagna?!! This is one of my favorite lasagna recipes in the world. Why? Because it is flavourful without the carbs of the traditional lasagna recipe. One of the first zucchini lasagna recipes I made was from one of my favourite blogs Skinny Taste. Gina’s recipes are always delicious, healthy, and easy-to-follow. And, her Zucchini Lasagna recipe is also great. My husband and I love it so much that I’ve made that recipe many times.

Her original recipe doesn’t call for spinach, but I add it to the tomato sauce to load this amazing lasagna recipe with more greens. I use skim ricotta and mozzarella cheese to save some calories, too. Please give this recipe a try. I am sure everybody in your home will love this vegetarian, low-carb, and gluten-free lasagna.

How I make the perfect zucchini noddles:

As you see, instead of lasagna noodles, I use zucchini noodles. So, how do you make perfect zucchini noddles? Well basically, you can make them using a sharp knife, a mandolin slicer, or a vegetable peeler. I’ve made this Spinach and Zucchini Lasagna many times and have made the zucchini noddles using all three tools. But, my favourite kitchen tool for making zucchini noodles is the mandolin slicer. Let me explain why.

First, it’s the fastest way to slice zucchini. It’s a perfect way to save time in the kitchen. Also, it creates exceptionally even slices, which is very important to bake the entire lasagna evenly. If you have thick and thin zucchini noodles, your lasagna may not cook evenly (some parts will be cooked and other parts won’t). It is easy and fast to clean, but of course, you have to be very careful since the blades are very sharp. I love to wear my cut-resistant gloves when I use my mandolin because it provides more protection.

How to layer the perfect low-carb Spinach and Zucchini Lasagna:

I’ve created this step-by-step photo tutorial to help you make the best Spinach and Zucchini Lasagna recipe you can. I’m sure you and your entire family will love it, and it’ll become one of your family’s favourite meals!

  1. First, spread about 1 cup of the spinach-tomato sauce on the bottom of your 13 x 9-inch casserole dish.

2. Add a second layer of about 6 or 7 zucchini slices over the tomato sauce. The amount of zucchini slices you need depends on the size of the zucchini.

3. After that, place about 1/2 cup to 3/4 cup of the ricotta mixture over the zucchini slices.

4. Top the ricotta mixture with mozzarella cheese. Use as much or as little mozzarella cheese as you wish.

5. Then, add another layer of zucchini noodles and tomato sauce. Repeat the layers until all your ingredients are used.

6. Top with more mozzarella cheese to add more flavour to this Spinach and Zucchini Lasagna recipe.

7. Finally, cover the casserole with aluminum foil, and bake the Spinach and Zucchini Lasagna for 30 minutes. Uncover the dish, and cook for 10-15 more minutes.

After you bake it, remove it from the oven, and let it cool for about 10 minutes. Sprinkle with chopped parsley, and serve. Delicious!

More low-carb zucchini recipes to try:

  1. Low-Carb Zucchini Lasagna Skillet: It’s a cheesy and saucy recipe that’s also a one-pan meal. It has a delicious sautéed mushroom filling, which takes this gluten-free lasagna to a new level of flavour.
  2. 5-Ingredient Chicken Zucchini Boats: These low-carb, gluten-free, 5-Ingredient Chicken Zucchini Boats are stuffed with chicken, homemade tomato sauce, and mozzarella/cheddar cheese.
  3. Low-carb Chicken Zucchini Enchilada: This recipe is made with “zucchini tortillas” and is loaded with enchilada sauce, chicken, and cheese. It’s also gluten-free and very flavourful!
  4. Sweet Potato Zucchini Casserole recipe: This casserole will be on your table in less than 30 minutes and is a one-pan meal loaded with protein, vitamins, and nutrients.

See below for how to make this Spinach and Zucchini Lasagna Recipe:

Spinach and Zucchini Lasagna Recipe

Yield: 9 people
Prep Time:
20 mins
Cook Time:
50 mins
Total Time:
1 hr 10 mins
This Spinach and Zucchini Lasagna is vegetarian, low-carb, and gluten-free. It is made with tomato sauce, skinny ricotta, mozzarella, and zucchini noodles.
Print Recipe
4.02 from 115 votes



  1. In a saucepan, heat the olive oil over medium heat.
  2. Add the onions, and cook 4-5 minutes until they are soft and golden.

  3. Add the garlic, and sauté, being careful not to burn the garlic.

  4. Add the tomato paste and stir well. Add the chopped tomatoes, including the juice in case you are using canned tomatoes.

  5. Add salt and ground fresh black pepper.
  6. Bring to a low simmer, cover, and cook for 25-30 minutes.

  7. Finally, remove from the heat, and add the fresh basil and spinach. Stir well.

  8. Adjust the seasoning if necessary.

  9. Arrange the zucchini slices in a single layer on a baking sheet coated with cooking oil spray. Broil for 5-8 minutes. Remove from the oven. Wait about 5 minutes to remove any excess moisture with paper towels if necessary. (This part is very important to avoid the lasagna becoming too soupy.)

  10. Preheat the oven to 375°F.

  11. In a medium bowl, mix the ricotta cheese, Parmesan cheese, and egg. Stir well.
  12. In a 9x12-inch casserole, spread some tomato-spinach sauce on the bottom.
  13. Layer 5 or 6 zucchini slices to cover.
  14. Place some of the ricotta cheese mixture on the zucchini slices, and top with some mozzarella cheese. Repeat the layers until all your ingredients are used.

  15. Top with sauce and mozzarella.
  16. Cover the casserole dish with aluminum foil, and bake for 30 minutes. Uncover, and cook an additional 10-15 minutes.

  17. Let stand about 10 minutes before serving. Garnish with parsley.

Recipe Notes

This recipe was adapted from the site Skinny Taste
If you like veggie lasagna noodles, I'm sure you will love this Eggplant Lasagna, too. Also, Zucchini Lasagna Roll and Slow Cooker Zucchini Lasagna are delicious, low-carb, and gluten-free. But if you also love lasagna with traditional noodles, this Skinny Lasagna Rolls recipe is perfect for you.
Here is a list of zucchini recipes that are great for eating healthier with fewer carbs and more fiber and nutrients from this versatile veggie.
Course: Main Course
Cuisine: American, Italian
Keyword: dinner, gluten-free, lasagna, low-carb, vegetarian, zucchini

Nutrition Information

Amount per serving (1/9) — Calories: 223, Fat: 12.4g, Cholesterol: 53mg, Carbohydrates: 10.6g, Sugar: 4.4g, Protein: 18.5g

If you make this recipe, follow @primaverakitchen on Instagram, snap a photo and hashtag it #primaverakitchen. I'd love to see what you're making!

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Spinach Zucchini Lasagna