Preheat Oven: Set oven to 375°F (190°C) and arrange tart shells on a baking sheet.
Make Cranberry Sauce: In a small saucepan over medium heat, combine cranberries, sugar, and water. Cook 5–7 minutes, stirring occasionally, until cranberries burst and sauce thickens. Let cool.
Assemble Tarts: Place a cube of Brie in each phyllo shell, then top with a teaspoon of cranberry sauce.
Add Rosemary: Sprinkle chopped rosemary evenly over the tarts.
Bake: Bake 8–10 minutes until phyllo shells are golden and cheese is melted.
Finish with Honey: Drizzle each tart with honey and, if desired, sprinkle with orange zest.
