Prepare your roasted veggies and/or other add-ins.
Cut the top off of the croissant with a serrated knife as pictured. Place on a rimmed baking sheet. Treat yourself to the tops as a snack, you deserve it!
Add egg and half and half to a small bowl and mix until incorporated.
Add in salt, pepper, and add-ins, mix and then pour the mixture into the croissant.
Bake at 350 for 20 minutes, or until the egg mixture is set.