Foryoueats: Truly Candied Yams (Sweet Potatoes)

Ingredients

• 2 1/2 pounds (1.1kg) sweet potatoes, peeled and sliced crosswise into 1/2-inch-thick rounds
• 1 cup light brown sugar (about 7 ounces, lightly packed; 200g)
• 1/4 cup unsalted butter (2 ounces; 60g)
• 1/2 cup (120ml) water
• 1 tablespoon (12g) Diamond Crystal kosher salt; for table salt, use about half as much by volume or the same weight
• 1 tablespoon (15ml) apple cider vinegar
• 1/8 teaspoon ground cinnamon
• 1/8 teaspoon ground allspice
• 1/8 teaspoon ground ginger