Butternut Squash With Pistou without eggs

2 tablespoons unsalted butter 1 yellow onion , thinly sliced 2 golden delicious apples , peeled, cored and thinly sliced 1 (32 ounce) jar butternut squash,[...]

4 -5 cups butternut squash, cubed (about 1 1/2 inch cubes) 1 medium carrot , chopped 1 medium yellow onion (1/2 chopped and 1/2 sliced) 2 stalks celery ,[...]