If making with homemade Polenta- make this first and let cool 6-8 hours in the fridge to set up. ( You could make this ahead, along with the sauce, filling and pesto drizzle.)

Preheat oven to 400F (prep and assembly will take around 45 minutes- with store-bought polenta)

Make filling: Heat 1-2 tablespoon olive oil in a large skillet over medium-high heat. Saute the onion, stirring until tender, about 5 minutes, add garlic and cook 2 more minutes.  Turn skillet to medium ( or medium-low)  and add the mushrooms and add salt pepper and Italian seasoning, and saute until the mushrooms release their liquid and this evaporates, about 10 minutes. Add the chopped spinach and wilt and mix to combine, adding a splash of water if needed. Cook-off any liquid. Adjust salt to your taste.

While the filling is cooking, make the Smoky Red Pepper sauce:  Add the diced tomatoes (and juices) to the blender and add the drained roasted pepper. Add 2 tablespoons olive oil, salt, pepper, smoked paprika, cumin and Italian herbs. Blend until creamy and smooth. If the sauce is too thick to get motor running, add a little water (a tablespoon at a time) just to get it going. Taste. It should have a sweet smoky flavor.

Prep the two tubes of polenta if using store-bought. (Remember to taste it)  It’s easiest to cut the tube in half. Then in quarters, so each quarter yields 3 equal slices. So 12 slices each from each tube about 3/4 inch thick.

Assemble: Spray a 9×13 inch baking dish with olive oil. Place 1/2-2/3  cup sauce on the bottom, coating bottom evenly. Add the first layer of polenta. Top with all the filling, spreading it out evenly. Dot with spoonfuls of ricotta. Sprinkle lightly with salt, pepper and nutmeg. Top with shredded cheese. Pour 1/2 cup sauce lightly over the cheese. Then top with final layer of polenta. Pour sauce over top (you may not need all) and using a spatula , evenly coat the polenta evenly. Save the remaining sauce for touching up after your remove the foil.  You could do this all ahead and refrigerate for 24 hours.

At this point, you could add more cheese to the top, or keep it a little leaner, up to you. Cover tightly with foil and bake 20 minutes. Remove foil and bake uncovered for 15-20 more minutes until bubbling and warmed through. If you want it “saucy”, add more sauce.

While it’s baking make the Pesto Drizzle. To make the pesto drizzle, simply place ingredients in a food processor and pulse until combined.

When the polenta lasagna is finished cooking you could drizzle it lightly with the pesto or serve it on the side.

Enjoy!