1 1/2 lbs thickly sliced yellow onions , a sweet variety if possible (about 6 cups)
1/2 cup mild-tasting olive oil
6 garlic cloves , thinly sliced
salt
1 lb green swiss chard , thick ribs removed and cut into 1-inch-wide ribbons
water , as needed
10 ounces day-old chewy peasant-style bread , cut into rough 1-inch cubes (8 to 10 cups)
3 -4 cups chicken stock (or another flavourful stock) or 3 -4 cups vegetable stock (or another flavourful stock)
6 ounces fontina (a combination works well) or 6 ounces gruyere (a combination works well) or 6 ounces another melting cheese , coarsely grated (a combination works well)

Read more: http://www.food.com/recipe/chard-onion-gruy-re-pan...