Made this for the 1st time tonight. Turned out very well. Whole family loved it. Some put a slice of bread on the bottom and on top and that was just to much bread. Soaked up all the broth. Will be making this again and again.
Slice onions about 1/4" thick. Separate into individual rings. In large fry pan add oil and butter over medium heat, add onions. Fry onions till caramelized and tender.
Pour beef broth, A-1 and seasonings into large dutch oven or slow cooker. Add cooked onions. Bring to a boil then turn to low and simmer. At least 1 hour. I had mine in the slow cooker for 4 hours.
Meanwhile while soup is simmering take your 4 slices of bread and put on a cookie sheet in 350 degree oven and toast/dry out til dry all the way through. I made fresh french bread in my bread-maker and sliced it 1" thick and toasted in the over for approximately 15 minutes(7 minutes a side)
Turn on your oven broiler to high. Fill 4 ovenproof soup bowls with onion soup, top with a slice of toasted bread and 1 oz shredded cheese or a slice of your favorite cheese. Put under broiler till cheese melts. Serve immediately.