2 medium butternut squash
3 tablespoons olive oil or melted butter
3 tablespoons butter
2 large yellow onions (diced)
2 tablespoons minced shallots
1 tablespoon minced fresh garlic
1 teaspoon fresh or dried thyme
5 cups chicken or vegetable stock
1/2 cup butter softened
1/2 cup unbleached all-purpose flour
1 cup brown sugar (packed)
1 cup heavy cream
2 tablespoons truffle oil (depending on strength of flavor)
  Sea salt (to taste)
  freshly ground pepper (to taste)