Butternut Squash and Apple Cider Soup with vegetables

2 tablespoons butter 1 onion, diced 1 butternut squash - peeled, seeded, and cut into large chunks 2 white potatoes, peeled and chopped 1 apple, peeled and[...]

5 tablespoons unsalted butter 6 cups peeled seeded cubed butternut squash, cut into 1/2-inch cubes 2 cups chopped leeks , white and light green parts only 1/2[...]