Peel and Slice 4-6 large onions, yellow or white
2 large leeks (opt) if using be sure to rinse well, leeks can be sandy and taste gritty
Melt 3 Tbs butter in a large pot, saute onions until browned.
Next add in
1/4 cup white wine to deglaze pan, scraping bottom to release any onion that has stuck.
Add 4-6 cups beef or vegetable broth.
Simmer 15- 30 minutes. You may add more both if too much evaporation occurs
Toast 1 in thick bread slices and lightly season with salt.
Place servings into individual oven proof bowls, Place toasted bread slice on each bowl and sprinkle with grated cheese -options for cheese- mozzarella, jarlsburg, assiago
Bake at 450 until cheese melts. Serve hot