Acorn Squash with margarine

1 large onion , thinly sliced 2 tablespoons oil 1 tablespoon sugar 1/4 cup maple syrup 1/4 cup honey 1/4 cup margarine or 1/4 cup butter 3 acorn squash ,[...]

2 large acorn squash (about 1-1/2 pounds each) 1 medium onion , chopped 2 garlic cloves , minced 3 tablespoons butter or 3 tablespoons margarine 1/2 cup[...]