Prep Your Ingredients: Thinly slice the Brie cheese. Lightly crush fresh blackberries to release their juices or leave whole. Optionally, reduce balsamic vinegar over low heat until thickened for a glaze.

Assemble the Sandwiches: On one slice of artisan bread, layer the Brie cheese and blackberries. Drizzle with balsamic vinegar or glaze, and sprinkle fresh thyme if using.

Butter and Grill: Butter the outside of each bread slice generously. Heat a skillet over medium heat and grill the sandwich once the skillet is hot.

Cook to Perfection: Grill for about 3-4 minutes on each side, or until the bread is golden brown and the cheese has melted. Press down lightly with a spatula for even grilling.

Serve: Cut the grilled cheese in half and serve immediately, enjoying the creamy, tangy, and sweet harmony of flavors.