Preparing the Blackberry Balsamic & Brie Grilled Cheese is a straightforward process that will have you enjoying this delicious sandwich in no time.

1. Prepare Blackberries: Rinse the blackberries under cold water and pat them dry with a paper towel.
2. Heat Pan: Preheat a non-stick skillet over medium heat.
3. Spread Butter: Spread one tablespoon of unsalted butter on one side of each slice of sourdough bread.
4. Assemble Sandwich: Lay two slices of bread, butter side down, onto the skillet. Layer with Brie cheese and top with blackberries.
5. Add Balsamic: Drizzle balsamic glaze over the blackberries and season with salt and pepper.
6. Top and Cook: Place the remaining slices of bread on top, butter side up. Cook for 3-4 minutes until golden brown.
7. Flip Carefully: Carefully flip the sandwiches to cook the other side, pressing down slightly to ensure even grilling.
8. Melt the Cheese: Cook an additional 3-4 minutes until the bread is golden and the Brie is melted.
9. Remove from Pan: Once cooked, remove the sandwiches from the skillet and let cool slightly.
10. Slice and Serve: Slice the grilled cheese in half and serve immediately. Garnish with fresh thyme leaves if desired.

Following these steps will lead to a mouthwatering creation that impresses every time.