Preheat your oven to 350°F (175°C).
Grease a 9x13 inch baking dish with butter or oil.
Cut the croissants into bite-sized pieces and place them in the dish.
In a bowl, whisk together eggs and milk until well combined.
Add salt, pepper, and dried herbs to the egg mixture.
Pour the egg mixture evenly over the croissant pieces.
Sprinkle cheese and chopped vegetables over the top.
Gently press the croissants down to soak up the egg mixture.
Bake in the preheated oven for 25-30 minutes until the top is golden and set.
Let it cool for a few minutes before serving.