For a warm and satisfying veggie sandwich, try making a roasted vegetable panini. Use your food processor to slice zucchini, bell peppers, and eggplant into thin strips. Toss the vegetables with olive oil, salt, and pepper, then roast them in the oven until tender. Spread pesto on two slices of bread and layer the roasted vegetables, along with some fresh mozzarella cheese, in between. Grill the sandwich in a panini press until the cheese is melted and the bread is crispy. Enjoy this flavorful and hearty sandwich for a delicious lunch or dinner.