With your reserved bacon drippings in large fry pan, saute the onions until translucent.
Add flour, stirring to prevent lumps.
Add chicken stock a cup at a time, stirring constantly to prevent lumps and it will thicken as you add them all.
Once all the stock is in, reduce heat to simmer. You can add the potatoes at this time OR use crock pot, put potatoes in crock pot with the thickened stock.
Add all the seasonings and bacon. Let simmer for about 10 minutes – do not let it boil.