Creating these delectable croissants is a straightforward process. Follow these step-by-step instructions:

1. Preheat the Oven: Begin by preheating your oven to 350°F (175°C) to prepare it for baking.
2. Slice the Croissants: Carefully slice each croissant in half horizontally, ensuring that both halves remain intact.
3. Spread the Mustard: Generously spread Dijon mustard on the inside of each croissant half. This will add a tangy depth to the flavor profile.
4. Layer the Ingredients: Place a slice of turkey ham and a slice of cheese on the bottom half of each croissant.
5. Add Sweetness: Drizzle honey or maple syrup over the cheese to introduce a sweet contrast to the savory elements.
6. Assemble the Croissants: Place the top half of the croissant back on, gently pressing down to secure the ingredients inside.
7. Bake: Transfer the assembled croissants to the preheated oven and bake for 10-15 minutes, or until the cheese has melted and the croissants are golden brown.
8. Garnish and Serve: Once baked, garnish with fresh herbs and a sprinkle of black pepper, if desired. Serve warm for the best experience.