感恩节餐桌上的小清新: 舒芙蕾千层红薯派(1/6)

2个红薯 2 sweet potatoes, pierced with a fork
1/4 小勺生姜粉 1/4 teaspoon ground ginger
1/2 小勺香草精油 1/2 teaspoon pure vanilla extract
1/4 小勺盐 1/4 teaspoon salt
4 个大号鸡蛋 4 large eggs
2 大勺红糖 2 tablespoon light brown sugar
1 杯子牛奶 1 cup milk
1块生姜 1 piece (2 inches) fresh ginger
4 大勺无盐奶油 4 tablespoon unsalted butter
1/4 杯普通面粉 1/4 cup all-purpose flour
一小撮塔塔粉 pinch of cream of tartar
1/4杯砂糖 1/4 cup granular sugar