Chop up 7lbs of yellow onions
Setup using the plate setter legs down then use some spacers to hold a pizza stone for an air gap.
Stabilize at 300
Use a large ceramic coated cast iron pot and gently cook the onions with only 1 tblsp of butter and 2 tblsp of salt.
Stir it every now and then, it will take hours to gently cook down and you don't want to rush it. This batch took 5 hours or so for the liquid to cook off. Toward the end you will need to stir more often so you don't burn the onions.
Remove the onions from the pot at this point, clean the pot and then return onions to pot.
Add 6 cups of water, a splash of sherry, a splash of red wine, and a splash of vinegar.
Raise the temp to 350 so it will simmer for an hour.
Ladle the soup into ramekins and top with crispy bread and Gruyère cheese.
Raise the temp to 450 and place them in until the cheese browns