Preheat oven to 375°F. Line baking sheet with parchment paper. Mix together chicken, red pepper, cilantro, mustard, honey, corn starch, salt and pepper until well combined; mix in Brie cheese cubes. Spoon 1 heaping tbsp. of filling into each tart shell, ensuring that every tart gets some Brie; transfer to prepared pan. Bake for 35 minutes or until filling is bubbling and pastry is golden brown.