Mashed Potatoes and Apples

INGREDIENTS

• 2 cups water, divided
• 1 teaspoon brown sugar
• 1 small lemon, halved and juiced, halves reserved
• 1 large apple (such as Honey Crisp), peeled and chopped
• 4 large baking potatoes, peeled and chopped
• 6 cups water
• 3 tablespoons butter
• 3 tablespoons heavy whipping cream
• 1 teaspoon salt
• 1 tablespoon ground black pepper