"Souper" Easy French Onion

I liked Josh and Rachel's idea of Souper Sunday, so I implemented it. I made French onion soup in the crockpot. It was crazy easy and really good. Here's the recipe:

4 lbs. sweet onions (like Vidalias or Walla Wallas)
4 1/2 c. beef broth
1/2 c. butter
splash of Worcestershire
provolone or provel cheese (for you lucky St. Louisans)
french bread

Melt the butter. Chop the onions however small you like the chunks in your soup and put in the crock pot. Pour the butter over them and toss to coat. Stir in the beef broth and Worcestershire. Cook on low for 14-18 hours or on high for 8-10. Pour into bowls, place a slice of french bread in soup, put a piece of cheese on top and pop in the oven until cheese melts.

Yum.