Butternut Squash Gratin without pine cookies

1 (2 -3 lb) butternut squash 2 tablespoons unsalted butter 3 cups halved and sliced onions salt 1/4 teaspoon black pepper 3 cups peeled peeled cored sliced[...]

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 tablespoon butter 1 tablespoon olive oil 2 large onions , chopped into 1-inch squares (about 4 cups) 3 tablespoons fresh sage , chopped or 1 tablespoon[...]

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[...]