3 pounds sweet potatoes, peeled and cut into 1-inch cubes
1 teaspoon kosher salt
3 tablespoons unsalted butter
1 red jalapeno chile, minced
¼ teaspoon grated orange zest
½ cup heavy cream
¼ cup vegetable stock
2 tablespoons sorghum or maple syrup
¼ teaspoon freshly grated nutmeg