Slice brie cheese into 8 slices.

Take 4 slices of bread.

Lay 2 slices of brie on each of the 4 bread slices.

To make the chili sauce, pound garlic and salt together using a mortar and pestle.

Stir in red pepper flakes and set aside.

Place cider vinegar in a saucepan and bring to a boil.

Stir in brown sugar, reduce heat, and simmer for 5 minutes.

Stir in the garlic mixture and cook for 1 minute.

Remove the pan from heat and let the sauce cool to room temperature.

Spread 1 tablespoon of sweet Thai chili sauce on each of the remaining 4 slices of bread.

Lay the sauced slices, sauce side down, on top of the cheese-covered bread.

Heat a large skillet over medium heat.

Put the sandwiches in the skillet.

Cook until the cheese has melted and the bread is golden brown, about 3 minutes per side.

Serve warm.