Kosher salt
1 1/2 (16-ounce) boxes lasagna noodles
Olive oil
1 pound spicy Italian turkey sausage
4 cloves garlic, smashed, divided
Crushed red pepper flakes
1 box frozen spinach, defrosted and wrung dry
1 fennel bulb, sliced thin
1 (12-ounce) package cremini mushrooms, stems removed, caps sliced
1 zucchini, cut in 1/2 lengthwise and cut on the bias
15 oz ricotta
2 cups grated Parmigiano-Reggiano, divided
2 eggs
6 to 7 basil leaves, cut into chiffonade
Marinara Sauce
1 pound grated mozzarella
Bring a large pot of well-salted water to a boil. Cook the lasagna noodles until they are soft and pliable but not limp, 6 to 7 minutes. Remove the pasta from the boiling water and lay flat on a sheet tray to cool. Reserve.
Coat a large saute pan with olive oil and bring to medium-high heat. Add the sausage and cook until brown and crumbly. Remove from pan and reserve on paper towels.
Add new olive oil along with 2 cloves of garlic and a pinch of crushed red pepper. Bring the pan to medium-high heat. When the garlic becomes golden and very aromatic, transfer oil to small dish.
Add 1 tbsp oil back into the pan. Toss in the mushrooms and season them with salt. Cook the mushrooms until they are soft and wilted and dark brown, 4 to 5 minutes. Remove from pan and reserve. Repeat this process with the fennel & zucchini.
Combine mushrooms, fennel, zucchini and spinach in a large bowl, mix until evenly distributed.
In a small bowl, combine the ricotta, 1/2 the Parmigiano-Reggiano, the eggs, and the basil. Mix to combine well and season with salt.
Preheat the oven to 350 degrees F.
In the bottom of a 9 by 13-inch deep-dish baking dish, arrange lasagna:
1. Couple ladlefuls of sauce spread out in an even layer. Arrange a layer of the lasagna noodles to completely cover the sauce.
2. Spread 1/2 of the ricotta mixture over the pasta. Place a layer of pasta going in the other direction as the first layer (this will give a little more stability).
3. Spread a light layer of sauce on the pasta and sprinkle 1/2 of the sausage over the sauce, followed by a layer of noodles.
4. Spread 1/2 of the veggies, sprinkle a layer of mozzarella and some of the remaining Parmigiano-Reggiano over the veggies. Cover with a layer or noodles.
5. Spread remaining ricotta mixture and top with a layer of noodles.
6. Spread a light layer of sauce on the pasta and sprinkle remaining sausage over the sauce, followed by a layer of noodles.
7. Spread remaining veggies, sprinkle with cheese and cover with noodles.
8. Cover last layer with sauce and sprinkled with mozzarella and Parmigiano. Cover with foil.
Place the lasagna on a baking sheet and bake in the oven until the lasagna is hot and bubbly, about 1 hour 15 minutes, removing the foil for the last 15 minutes of cooking. Let cool for 20 minutes before slicing.
Adapted from Anne Burrell via Food Network.