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1
Trim ends off zucchini. Thinly slice zucchini lengthwise. You should have 9 slices total, about 1/8 inch thick. Place in a single layer on a lightly greased baking sheet; brush lightly with 1 teaspoon of the olive oil. Broil 3 to 4 inches from heat about 5 minutes until crisp tender, turning once. Cool.
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2
Grease a 2 quart square baking dish.
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3
In a large saucepan heat the remaining 3 teaspoons olive oil over medium high heat. Add the carrots, onion and garlic; cook and stir about 5 minutes or until tender. Add marinara sauce, basil, and pepper. Bring to boiling; reduce heat. Simmer, covered, for 10 minutes, stirring occasionally.
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4
In a small mixing bowl toss together the mozzarella cheese and parmesan; set aside.
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5
In the prepared baking dish arrange 2 noodles. Spread with a third of the sauce. Sprinkle with a third of the nuts. Top with a third of the zucchini, then sprinkle with a third of the cheese mixture. Repeat layering, alternating the direction of the zucchini in each layer and finishing with the zucchini; set remaining cheese aside.
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6
Bake covered, in a 375 degree oven for 20 minutes. Uncover and sprinkle with the remaining cheese. Bake, uncovered, about 20 minutes more or until heated through. Let stand 15 minutes before serving.
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7
MAKE AHEAD TIP: Prepare lasagna as directed, except do not bake. Wrap and freeze for up to 1 month. Freeze cheese for topping separately. To serve, thaw in refrigerator overnight. Bake, covered, in a 350 degree oven for 1 hour. Sprinkle with reserved cheese. Bake, uncovered, about 15 minutes more, or until heated through. Let stand 15 minutes before serving.