Meanwhile, in a medium skillet (or large soup pot, if you’ll be serving soup from that pot), warm 1 tablespoon olive oil over medium heat until shimmering. Add the chopped shallot and 1 teaspoon salt. Cook, stirring often, until the shallot has softened and is starting to turn golden on the edges, about 3 to 4 minutes. Add the garlic and cook until fragrant, about 30 seconds, stirring frequently.
Preheat the oven to 425 degrees Fahrenheit and line a rimmed baking sheet with parchment paper. Place the butternut squash on the pan and drizzle with just enough olive oil to lightly coat the squash on the inside. Rub the oil over the inside of the squash and sprinkle it with salt and pepper. Turn the squash face down and roast until it is tender and completely cooked through, about 45 to 50 minutes. Set the squash aside until it’s cool enough to handle, about 10 minutes. Then use a large spoon to scoop the butternut squash flesh into a bowl and discard the tough skin.