Drawing non-object, System.Serializable class in an Editor Window

I have a class that has the System.Serializable attribute, but doesn't derive from Object, so I cannot use

Editor.CreateEditor(..)

I want to create an Editor Window that can inspect all the fields of this class.

If I put this class inside a MonoBehaviour and mark it public or [SerializeField], the class can be inspected in the inspector through that MonoBehaviour - I'm trying to achieve the same thing - but in an Editor Window instead. I'm guessing Unity's default MonoBehaviour inspector code goes through a serializable class field-by-field through reflection? Is there any way I can leverege this code in my Editor Window?