Brown sausage in a large skillet, breaking it apart with a wooden spoon as it cooks.
Add flour and cook for 1 minute, stirring it into the sausage.
Add sage and slowly whisk in milk. Simmer for several minutes.
Season with salt, pepper, and nutmeg.
Video
Notes
If the gravy is too thick for your liking, add a little extra milk.To make spicy, use "Hot" breakfast sausage or add a pinch of cayenne pepper or crushed red pepper flakes.