Roasting vegetables brings out their natural sweetness and adds a delicious depth of flavor to this lasagna recipe. A medley of roasted vegetables, including zucchini, bell peppers, and eggplant, are layered with lasagna noodles, marinara sauce, and cheese. The result is a hearty and satisfying dish that is packed with nutrients. This recipe is a great way to use up any leftover vegetables you have on hand.