1 16-ounce loaf country-style french bread with crust, cut into 1-inch cubes (about 11 cups) |
10 tablespoons (1 1/4 sticks) butter |
2 bunches green onions, thinly sliced |
2 cups finely chopped celery |
3/4 cup chopped fresh italian parsley |
1 tablespoon chopped fresh oregano |
1 tablespoon chopped fresh sage |
1 tablespoon chopped fresh thyme |
1 large garlic clove, minced |
1 teaspoon coarse kosher salt |
1 teaspoon freshly ground black pepper |
1 large bunch swiss chard, stems cut from leaves and discarded, leaves coarsely chopped (about 12 cups) |
3 large eggs |
3/4 cup (or more) low-salt chicken broth |
3 ounces coarsely grated parmesan cheese (optional) |