For enhanced flavor, consider adding a squeeze of fresh lemon juice to the fennel before roasting. To prevent burning, ensure the fennel slices are arranged in a single layer on the baking sheet. Feel free to experiment with other hard cheeses like Pecorino Romano or Grana Padano for a different flavor profile. If you don't have parchment paper, lightly grease the baking sheet to prevent sticking. The roasting time may vary depending on the thickness of the fennel slices and your oven. Keep a close eye on the fennel and adjust the cooking time accordingly.