Cornbread Stuffing with butter

nonstick cooking spray 1/4 cup butter 2 cups chopped onions 1 cup sliced celery 2 cups water 1 (16 ounce) can corn , drained 2 (4 ounce) cans diced green[...]

5 tablespoons butter , divided 2 onions , chopped 4 stalks celery , chopped into small dice 6 cups cornbread, crumbled 6 tablespoons fresh sage leaves ,[...]