This five-ingredient appetizer packs a lot of flavor and texture into one bite. For some holiday green, top red pepper jelly with fresh parsley.
Preheat oven to 350°F. Arrange pastry shells on a rimmed baking sheet. Cut Brie into 24 very small pieces. Spoon 1/4 teaspoon jelly into each shell; top evenly with Brie pieces and pecans. Bake in preheated oven until cheese is melted, 7 to 8 minutes. Sprinkle with salt; serve immediately.