Preheat oven to 350° F.
Melt preserves and water in small pan over low heat. Brush melted preserves over top and sides of well-chilled Brie. Arrange plum slices decoratively on top of Brie. Brush fruit with additional melted preserves. Sprinkle with walnuts. Place Brie on foil-lined baking sheet with low sides.
Bake for 10 to 15 minutes in center of oven until heated through. Remove from oven and let sit for 2 to 3 minutes. With large spatula, carefully transfer to serving platter.
Serve with assorted lahvosh crackers, torn pieces of Tuscan bread and pear slices.
Servings: 6 to 8