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1
Preheat the oven to 375 degrees F.
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2
Bring a large pot of lightly salted water to a boil and cook the lasagna noodles for 10 to 12 minutes.
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3
Drain the noodles and drizzle them with 1 tablespoon of the olive oil, and then set the noodles aside for later use.
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4
(If you are using no-boil noodles, skip this step.)
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5
Heat the remaining 2 tablespoons olive oil in a large skillet set over medium heat and cook the shallots until softened and translucent, 4 to 5 minutes.
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6
Add in the garlic and zucchini, and cook for 1 minute.
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7
Stir in the spinach and cook until wilted, 2 to 4 minutes.
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8
In a large bowl, stir to combine the ricotta, Parmesan, salt, pepper and egg, and set aside for a later use.
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9
To assemble the lasagna, spoon 1/2 cup of the Chunky Marinara Sauce into the bottom of a 9-by-13-inch baking dish.
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10
Top with 3 noodles, slightly overlapping.
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11
Spread one-third of the ricotta mixture over the noodles, then add one-third of the cooked zucchini and spinach, evenly distributing over the ricotta.
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12
Top with 2 cups of the mozzarella, then top with 1 cup of the sauce.
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13
Repeat the layering two more times, ending with a layer of noodles and a sprinkle of mozzarella.
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14
Cover with foil and bake for 40 minutes.
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15
Remove the foil and continue to bake until bubbling and cooked through, 10 to 20 minutes more.
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16
Cool for 10 to 15 minutes before serving.
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17
Heat the olive oil in a large saucepan set over medium heat and add the carrots, celery and onions, and cook until soft and translucent, stirring occasionally, 8 to 10 minutes.
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18
Stir in the garlic and cook for 1 minute, then stir in the oregano, chile flakes, tomato puree, chopped tomatoes, basil leaves and some salt and pepper.
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19
Bring to a simmer and cook for about 30 minutes.