If you plan ahead, a slow cooker can do almost all the work for you.
Faith Durand at cooking blogThe Kitchnsuggests that a slow cooker will do all the heavy listing instead.
Cook it overnight on the low settingor for at least 12 hours.
Boom, a whole batch of caramelized onions.
Slow cookers justmake some things so much easier, and French onion soup is a delicious, savory dish.
For the complete guide and ingredient options, check out the link below.
How to Make French Onion Soup in the Slow Cooker| The Kitchn