Mashed Sweet Potatoes

Bahan-bahan (8 porsi)

• 4 pounds sweet potatoes (about 6 potatoes)
• 4 teaspoons salt (divided)
• ½ cup half-and-half
• ½ teaspoon chipotle chile powder ((reduce to 1/4 teaspoon if sensitive to spice; increase to 3/4 to 1 teaspoon for more of a kick))
• ½ teaspoon ground cinnamon
• ¼ teaspoon ground nutmeg
• ⅓ cup whole milk plain Greek yogurt
• 3 tablespoons pure maple syrup
• 3 tablespoons unsalted butter (diced)
• Chopped fresh thyme