Boil water and remove from heat. Steep rooibos tea for 10 minutes. Sweeten to taste, then refrigerate until cool.
Let brie sit at room temperature.
In a bowl, mix butter, chives, parsley, dijon, and garlic. Season with salt and pepper.
Toss arugula with lemon juice. Season with salt and pepper.
Spread herb butter on the bottom half of the baguette. Layer with ham, Brie, and season with salt and pepper. Top with arugula and cover with the top half of the baguette.
Enjoy the jambon beurre with chips, pickle, and iced rooibos tea.