Butternut Squash with breadcrumbs

1/4 cup unsalted butter 4 cups thinly sliced onions (about 1 pound) 2 1/2 lbs butternut squash , peeled, seeded, cut into 1/2-inch cubes 1 teaspoon sugar 1/2[...]

1/4 cup olive oil 4 cups onions , thinly sliced 4 fresh thyme sprigs 2 tablespoons fresh sage , chopped salt & freshly ground black pepper 3 cups butternut[...]