Creating the Savory Ham & Cheese Croissant Bake is simple if you follow these steps:

1. Preheat the Oven: Preheat your oven to 350°F (175°C) and grease a 9×13-inch baking dish with butter.

2. Prepare the Croissants: Cut the croissants into bite-sized pieces and spread them evenly in the greased baking dish.

3. Add the Ham and Cheese: Sprinkle the diced ham and shredded cheese over the croissant pieces, ensuring even distribution.

4. Mix the Egg Mixture: In a large bowl, whisk together the eggs, milk, Dijon mustard, salt, and black pepper until well combined.

5. Combine: Pour the egg mixture evenly over the croissant, ham, and cheese layers, pressing down gently to ensure all the croissant pieces soak up the mixture.

6. Add Chives: If using, sprinkle the chopped chives on top for added flavor and garnish.

7. Bake: Place the baking dish in the preheated oven and bake for 35-40 minutes, or until the top is golden brown and the egg is set.

8. Cool: Remove from the oven and let it cool for 5-10 minutes before serving.

9. Serve: Cut into squares and serve warm, enjoying the incredible flavors of your Savory Ham & Cheese Croissant Bake.