• Halve ciabattas; toast until golden.

• Meanwhile, wash and dry produce. Slice tomato into 1/4-inch rounds. Tear or slice prosciutto crosswise into bite-size pieces.

• In a medium bowl, toss arugula with a drizzle of olive oil, salt, and pepper.

• Spread mayonnaise onto cut sides of bottom ciabatta halves. Spread jam onto cut sides of top ciabatta halves; sprinkle with as many chili flakes as you like. Layer bottom ciabatta halves with as much dressed arugula as you like. Top with prosciutto, gouda, and tomato. Close sandwiches.

• Halve sandwiches on a diagonal; divide between plates and serve with any remaining arugula on the side.