In a medium bowl, with an electric mixer, beat egg yolks, hot water, and vanilla together until very thick and pale.
Slowly beat in 1/2 cup fructose and set aside. In a small bowl, beat egg whites until foamy. Add salt, and continue beating until whites hold soft peaks.
Gradually add remaining 1/4 cup fructose to egg whites, beating until stiff but not dry. Stir 1/3 of whites into yolks, and sift flour and baking powder over egg mixture. Add pecans and remaining whites, and gently fold until blended.
Place 12 paper liners in a 12-cup muffin pan. Spoon batter evenly into cups, and bake for 20 minutes or until a toothpick inserted into a cupcake comes out clean.