Roasted vegetable lasagna is a delicious twist on the classic recipe. Instead of sautéing the vegetables, they are roasted in the oven to bring out their natural sweetness and enhance their flavors. The roasted vegetables, such as eggplant, mushrooms, and red onions, are then layered with lasagna noodles, tomato sauce, and a blend of cheeses. The end result is a lasagna that is bursting with flavor and has a wonderful depth of taste.