Preheat oven to 350f. Spray a baking pan and set aside.
In a 12-inch skillet, brown the sausage, and when it’s almost done add mirepoix and cook for 2 minutes.
Pour in broth, salt, pepper, and poultry seasoning.
Add croutons and stir. Turn off the heat and cover the skillet. Allow the croutons to soften and absorb most of the water.
Meanwhile, beat the egg. Once the croutons have softened, stir in the egg.
Tip out the stuffing into the prepared baking pan.
Bake for 20-30 minutes until the stuffing has set and the top is browned.
If you choose to use a different kind of low-carb (like Sola bread, Box'd Kitchen Bread, or L'oven Fresh) bread to make this, I suggest toasting it first to make sure it's crispy.
You can use this to stuff a turkey like you can any regular stuffing recipe.