For optimal flavor, use high-quality, freshly baked ciabatta rolls. Feel free to substitute other vegetables based on seasonal availability and personal preference, such as bell peppers, asparagus, or spinach. If you don't have Marsala wine, you can use dry sherry or vegetable broth as a substitute. For a richer flavor, consider using smoked mozzarella cheese. Homemade garlic basil pesto, roasted garlic and tomato spread, and artichoke aioli will elevate this dish to new heights.