Slice the baguette in half lengthwise and drizzle the cut sides with olive oil.
Broil in the oven for a few minutes until golden and crisp, watching closely so it does not burn.
Layer on the prosciutto, sliced peaches, red onion, and torn burrata.
Drizzle with more olive oil and season with salt, pepper, and chili flakes.
Top with arugula and drizzle with balsamic glaze.
Close the sandwich and cut in half. Serve and enjoy.