Preheat oven to 350°F. Place brie in an oven-safe dish and lightly score the top in a crosshatch pattern.
Spread fig jam over the brie, followed by half the torn prosciutto.
In a small bowl, mix walnuts, honey, rosemary, garlic, salt, and pepper.
Spoon the honey-nut mixture over the brie and finish with the remaining prosciutto.
Bake for 15–20 minutes until warm and gooey. Broil for the last 1–2 minutes if you want the prosciutto extra crispy!
Serve warm with crackers or crostini and enjoy!