Bruce try this one......
Take a nice big Vidalia or red onion and cut the top off.
Hollow out the core. I use a corer and stop just short of going all the way through.
Place a small amount of beef bouillon into the hole. I use a 1/2 teaspoon of Minor's.
Fill the hole with brown sugar.
Wrap in foil and place in cooker.
It will take at least 1 hour to cook.
You can also do this same thing with very thick slices...no need to core! Just plop some bouillon and brown sugar on the slice and wrap.