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This low-carb zucchini lasagna is a healthy and diabetes-friendly alternative to normal lasagna, with 30 grams of protein and only 12 grams of carbs per serving!

Two plates of low-carb zucchini lasagna on a table

This low-carb zucchini lasagna proves you don’t need pasta or a heavy sauce to make a delicious lasagna!

I had tried a lot of “healthy” lasagna recipes before but never found one I liked. So I came up with my own, and now, it’s one of my favorite meals to make for guests!

Why you will love low-carb zucchini lasagna

  • It’s low-carb and won’t spike your blood sugar
  • It has plenty of protein per serving (30 grams!)
  • It’s packed with fresh vegetables and lean protein
  • You can make this dish to feed a crowd

Reader reviews

Delicious every time! I’m the T1D – but everyone prefers this version. We don’t miss lasagna noodles at all. Thanks for this recipe.

Michelle
Rating

I have made this dish a couple of times and received rave reviews.

Jeff
Rating

Low-carb zucchini lasagna ingredients

This recipe uses simple, wholesome ingredients that develop deep flavor for a super satisfying lasagna!

Zucchini lasagna ingredients on a table
  • Zucchini — Thinly sliced zucchini replaces traditional lasagna noodles for a low-carb dish that’s packed with fiber.
  • Tomatoes — I recommend fresh tomatoes to add natural sweetness and a rich base for the sauce.
  • Onion — Add a sweet and savory depth to the meat sauce.
  • Garlic — I recommend using fresh for the best flavor, but you can use jarred or even garlic powder in a pinch.
  • Serrano chili — You can adjust the amount based on your heat tolerance or omit entirely if you’re not a fan of spicy food.
  • Mushrooms — Add an earthy flavor and give the sauce more texture.
  • Cooking spray — I recommend spraying the pan to prevent the zucchini and meat from sticking.
  • Ground beef — This is our main source of protein! I like to use 92% lean to give the lasagna a nice heartiness without making it greasy.
  • Chicken bouillon — This enhances the flavor of the sauce.
  • Mozzarella — I recommend using low-fat mozzarella. The cheese melts beautifully on top of the lasagna.
  • Seasonings — A combination of paprika, dried thyme, and dried basil enhances the rich flavor of the lasagna.
  • Salt and pepper — Adjust to taste. You’ll also use the salt to help draw moisture out of the zucchini.

How to make low-carb zucchini lasagna

Step 1: Use a julienne peeler to cut the zucchini into ½-inch (1 cm) slices. Sprinkle lightly with salt and set aside for 10 minutes.

Step 2: Blot the zucchini slices with a paper towel to remove excess moisture.

Zucchini slices on a baking plate

Step 3: Grill or broil the zucchini in the oven for 3 minutes at high heat.

Step 4: After grilling or broiling, place the zucchini on paper towels (you want to get as much of the liquid out as possible).

Step 5: Cut off the ends of the tomatoes and make an X insertion on top. Place in boiling water for 3 minutes, then pour cold water over them and peel off the skin. Alternatively, you can use canned tomatoes.

Tomatoes in boiling water

Step 6: Roughly chop onions, garlic, chili, peeled tomatoes, and mushrooms.

Step 7: Add a little cooking spray to a deep skillet and fry the garlic, onion, and chili for 1 minute.

Step 8: Add the tomatoes and mushrooms to the skillet and sauté the vegetables for 4 minutes. Take them off the heat and set aside.

Vegetables sautéing in a cast-iron pan

Step 9: Cook the beef with the paprika in the same skillet you used for the veggies until fully browned.

Beef and paprika cooking in a skillet

Step 10: Add the vegetables back into the skillet, then add the chicken bouillon and the remaining spices. Allow the sauce to simmer for 25 minutes over low heat.

Vegetables and beef sautéing in a skillet

Step 11: Heat the oven to 375 degrees F (190 C).

Step 12: Line a small baking tray with parchment paper and use 1/3 of the zucchini to make a layer in the bottom. Put 1/3 of the meat sauce on top. Add another layer of zucchini and continue like this until you’re out of sauce and zucchini.

Layers of zucchini and meat sauce in a baking tray

Step 13: Spread shredded mozzarella on top and bake for 35 minutes.

Step 14: Take the lasagna out of the oven and allow to rest for 10 minutes before serving.

Finished lasagna on a table

That’s it! It may look like a lot of work, but it’s all very straightforward. It’s easy once you get started!

I make this all the time for guests because it’s one of the easiest recipes to make for a lot of people.

Recipe tips and tricks

  • Slice the zucchini as thinly as possible to ensure it cooks evenly and absorbs the flavors of the sauce.
  • Salt the zucchini slices and let them sit for 10 minutes to draw out excess moisture, then pat them dry. This helps prevent a watery lasagna.
  • Brown the ground beef thoroughly to bring out its natural flavor before adding the spices and vegetables.
Fork holding a bite of zucchini lasagna over a plate of lasagna

Substitutions and variations

  • You can swap ground beef for ground turkey or bison for a lighter option.
  • For a lactose-free version, you can replace the mozzarella with a dairy-free cheese.
  • I sometimes add red chili flakes or a hotter chili in place of the serrano when I want a spicier lasagna.

What to serve with this recipe

This hearty zucchini lasagna is satisfying enough to enjoy all on its own!

If I’m looking for a cozy side, I love making some keto garlic bread. These spinach ricotta dumplings are another delicious option.

For something lighter, I love a good eggplant caprese salad as an appetizer. Otherwise, you can’t go wrong with some mixed greens tossed in a lemon vinaigrette!

Storage and freezing

  • Leftovers can be stored in an airtight container in the refrigerator and should be eaten within a day or two. After that, the veggies start to get mushy.
  • I don’t recommend freezing zucchini lasagna as the vegetables will lose their crisp texture when they thaw.
Knife cutting into the lasagna

Other low-carb zucchini recipes

Looking for a few more yummy zucchini dishes that you can easily make for a crowd (or all for yourself)? Here are a few of my favorites:

For more inspiration, you can check out my roundup of the best healthy low-carb zucchini recipes.

Low Carb Zucchini Lasagna

4.58 from 49 votes
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This Low Carb Zucchini Lasagna is a healthy and tasty alternative to normal lasagna that packs 30 grams of protein and only 12 grams of carbs and 8 grams of fat per serving!
Prep Time: 30 minutes
Cook Time: 1 hour
Total Time: 1 hour 30 minutes
Servings: 4

Ingredients 

  • 2 medium zucchini
  • ½ teaspoon salt
  • 3 tomatoes
  • ounces onion
  • 2 cloves garlic
  • 1 serrano chili
  • ounces mushrooms
  • Cooking spray
  • 16 ounces ground beef, (92% lean)
  • 1 teaspoon paprika
  • ½ cube Knorr chicken bouillon
  • 1 teaspoon dried thyme
  • 1 teaspoon dried basil
  • teaspoon pepper
  • ½ cup shredded low-fat mozzarella

Instructions

  • Use a julienne peeler to cut the zucchini into ½-inch (1 cm) slices. Sprinkle lightly with salt and set aside for 10 minutes.
    2 medium zucchini, ½ teaspoon salt
  • Blot the zucchini slices with a paper towel to remove moisture.
  • Grill or broil the zucchini in the oven for 3 minutes at high heat.
  • After grilling or broiling, place the zucchini on paper towels (you want to get as much of the liquid out as possible).
  • Cut off the ends of the tomatoes and make an X insertion on top. Place in boiling water for a few minutes, then pour cold water over them and peel off the skin. Alternatively, you could used canned tomatoes.
    3 tomatoes
  • Roughly chop onions, garlic, chili, peeled tomatoes, and mushrooms.
    4½ ounces onion, 2 cloves garlic, 1 serrano chili, 5½ ounces mushrooms
  • Add a little cooking spray or vegetable oil to a deep skillet and fry the garlic, onion, and chili for 1 minute.
    Cooking spray
  • Add the tomatoes and mushrooms to the skillet and sauté the vegetables for an additional 4 minutes. Then take them off the heat and set aside.
  • Cook the beef with the paprika in the same skillet you used for the veggies until fully browned.
    16 ounces ground beef, 1 teaspoon paprika
  • Add the vegetables back into the skillet, then add the chicken bouillon and remaining spices. Allow the sauce to simmer for 25 minutes over low heat.
    ½ cube Knorr chicken bouillon, 1 teaspoon dried thyme, 1 teaspoon dried basil, ⅓ teaspoon pepper
  • Heat the oven to 375 degrees F (190 C).
  • Line a small baking tray with parchment paper and use 1/3 of the zucchini to make a layer in the bottom. Put 1/3 of the meat sauce on top. Add another layer of zucchini and continue like this until you’re out of sauce and zucchini.
  • Spread shredded mozzarella on top and bake for 35 minutes.
    ½ cup shredded low-fat mozzarella
  • Take the lasagna out of the oven and allow to rest for 10 minutes before serving.

Notes

This recipe is for 4 servings of lasagna.
Steps 1-4 are very important for removing moisture from the zucchini so you don’t end up with a watery lasagna.
I do not recommend making this dish ahead of time, as the veggies will start to get mushy after it’s sat in the refrigerator for about a day.
If you have leftovers, you can store them in an airtight container in the fridge and eat within a day or 2.

Nutrition Info Per Serving

Nutrition Facts
Low Carb Zucchini Lasagna
Amount per Serving
Calories
244
% Daily Value*
Fat
 
7.9
g
12
%
Saturated Fat
 
3.5
g
18
%
Polyunsaturated Fat
 
0.1
g
Cholesterol
 
67.5
mg
23
%
Sodium
 
558.4
mg
23
%
Potassium
 
537.3
mg
15
%
Carbohydrates
 
12.3
g
4
%
Fiber
 
3.6
g
14
%
Sugar
 
6.3
g
7
%
Protein
 
30.4
g
61
%
Vitamin A
 
2855
IU
57
%
Vitamin C
 
26.4
mg
32
%
Calcium
 
132
mg
13
%
Iron
 
3.7
mg
21
%
Net carbs
 
8.7
g
* Percent Daily Values are based on a 2000 calorie diet.