The next day, I started by warming the onions in my regular dutch oven, and when the solidified butter had melted sifted the flour into the onion mixture. I then added all the liquids and the satchet and adjusted the heat for a brisk simmer. As the mixture cooked I skimmed any scum off the top about every 15 to 20 minutes. After about 1 1/2 hours the soup had reduced by about 1/4th and was finished.
To serve, I sliced the bread into ~ 1/2 inch pieces and baked in a 400 degree oven until cripsy and crouton like. I then filled large ramekins to about 1/2 inch from the top with soup, floated a few of the croutons and topped with a slice of cheese and finished with some grated cheese. It is important not have any of the crouton exposed as this will char under the broiler and taste awful. The ramekins were then placed on a baking sheet and under the broiler until the cheese was browned and bubbling ~ 2 minutes.
I served with a simple salad of bibb lettuce with a champagne vinegar, vinegarette and for a main course, some grouper sauted with slivered almonds and brown butter and simple boiled potatoes.
Of course I burned the hell out of my mouth on this soup, but I have been told by all that it was delicious. The soup was very sweet and I didn't think the store-bought broths affected badly whatsoever. I would make this 100 times over...it was good! Next time, I will just have it with a grilled cheese sandwich and will curtail my hunger until the temperature drops below magma!