Let the Brie sit at room temperature so it softens slightly while you prepare the rest of the ingredients.
In a small bowl, mix together the softened butter, minced chives, minced parsley, Dijon mustard, and grated garlic. Season with salt and black pepper to taste.
In another bowl, toss the arugula with lemon juice and a pinch of salt and pepper to brighten the flavor.
Spread the herb butter on the bottom half of the sliced baguette.
Layer the sandwich with thinly sliced deli ham, softened Brie, and a pinch of salt and black pepper.
Top with dressed arugula and place the top half of the baguette over the fillings.
To make the mango lassi, combine the frozen mango, yogurt, milk, cardamom powder, and sugar in a blender. Blend until smooth and creamy. Taste and adjust sweetness if needed.
Serve the sandwich with carrot sticks, hummus, pickle spears, and mango lassi. Enjoy!