Tear the croissants into large pieces and layer them into a greased casserole dish.
Sprinkle the crispy bacon over the croissants, followed by most of the cheese.
Whisk together eggs, cream, Dijon, and seasonings until smooth.
Pour the egg mixture evenly over everything and gently press the croissants down so they soak it up.
Top with the remaining cheese and bake until golden, puffed, and set in the center.