02Toss the mushrooms, carrots and thyme with the remaining tablespoon of olive oil and season to taste with salt and pepper. Place on the parchment-lined baking sheet and roast for 15 to 20 minutes, stirring halfway through, until the carrots are lightly caramelized and the mushrooms tender. Remove from the oven and reduce the heat to 350 degrees.
03Lightly oil a rectangular baking pan. Stir the mushrooms and carrots into the marinara sauce. Spread a small spoonful of the sauce over the bottom of a baking pan. Top with a layer of lasagna noodles. Top the noodles with a spoonful of sauce, then a layer of eggplant slices. Top the eggplant with half of the mozzarella and a sprinkling of Parmesan. Repeat the layers, ending with a layer of lasagna noodles topped with a layer of tomato sauce and a layer of Parmesan.
04Cover the baking dish tightly with foil and place in the oven. Bake 40 minutes, until the noodles are tender and the mixture is bubbling. Uncover and, if you wish, bake another 10 minutes, until the top begins to brown. Remove from the heat and allow to sit for 5 to 10 minutes before serving.