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Cheesy Spinach-Zucchini Lasagna

This lasagna takes forever to make but is absolutely worth it!
This lasagna takes forever to make but is absolutely worth it!

I found this recipe in 2022 and have really been enjoying it. I make one for me (that is this recipe–more or less) and one for my husband (with meat.) We freeze it and are able to enjoy it for a while. It has been described as having "more vegetables than any lasagna I've ever had," by my mom.


3 tablespoons garlic olive oil, divided

1 pound mushrooms, thinly sliced

carrots (I often prebake these and have them on hand)

½ teaspoon salt

¼ teaspoon ground pepper

1 (11 ounce) package baby spinach

1 large egg, lightly beaten

1 (15 ounce) container part-skim ricotta cheese

1 1/2 cups shredded part-skim mozzarella, divided

1 cup grated Parmesan cheese, divided

1 25-ounce jar marinara sauce, divided

6 sheets oven-ready lasagna noodles

1 medium zucchini, cut lengthwise into 1/8-inch planks

Chopped fresh basil and/or parsley for garnish


Generously coat a 9-by-13-inch baking dish with cooking spray. Heat 2 tablespoons oil in a large skillet over medium-high heat. Add mushrooms, salt and pepper and cook, stirring occasionally, until the mushrooms are tender and starting to brown, 6 to 8 minutes. Transfer to a small bowl.


Heat the remaining 1 tablespoon oil in the pan and add half the spinach. Cook, stirring frequently, until wilted, about 3 minutes. Add the remaining spinach by the handful and cook until it's all wilted, about 2 minutes more. Press the spinach to the side of the pan, squeezing out as much water as possible, and cook until the water is evaporated, 2 to 3 minutes more. Remove from heat. (Alternatively you can use frozen spinach. Warm it in the microwave and squeeze out the moisture.)


Mix egg, ricotta, 1 cup mozzarella and 1/2 cup Parmesan in a medium bowl. Combine the remaining 1/2 cup each mozzarella and Parmesan in a small bowl.


Assemble the lasagna.

  • 1 cup sauce

  • 3 noodles

  • 1 cup of the ricotta mixture

  • top with the mushrooms, spinach, carrots

  • 1 cup sauce

  • 3 noodles

  • remaining ricotta mixture

  • zucchini

  • remaining sauce

  • mozzarella mixture


You can refrigerate this overnight or bake it immediately. When you're ready to cook it, preheat oven to 375°F.

Bake the lasagna until bubbly and the cheese is beginning to brown, about 45 minutes. Let cool for at least 10 minutes before slicing. Garnish with basil and/or parsley, if desired.


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