Butternut Squash without spinach greens

2 tablespoons butter 1 small onion, chopped 1 stalk celery, chopped 1 medium carrot, chopped 2 medium potatoes, cubed 1 medium butternut squash - peeled,[...]

1 tablespoon canola oil 1 tablespoon unsalted butter 1/2 cup diced onion 3/4 cup diced carrots 4 cups peeled and cubed butternut squash 3 cups vegetable stock[...]