1. Preheat the oven to 425℉ and line a baking dish with parchment paper.
2. In a bowl or Ziploc bag, coat the pumpkin in the olive oil, chili flakes, salt, and pepper.
3. Place the seasoned pumpkin in a single layer in the baking dish, drizzle with half the honey, and top with the rosemary sprigs.
4. Once the pumpkin is dressed and ready to cook, place it in the oven to bake for 15 minutes.
5. After that time, remove the pumpkin from the oven, flip the slices, drizzle with the other half of the honey, crumble the feta on top, and place it back in the oven to bake for another 10 to 15 minutes.
6. After that time, remove the pumpkin from the oven, serve, and enjoy!