Cut the potato into 1.5cm dice and boil until tender. Drain and set aside, but reserve 2 tablespoons of the starchy cooking water. Prepare the fennel by slicing off the stems and fronds and ...

A boiled white potato has a GI of 71, while a boiled sweet potato has a GI of 66. Vitamins and minerals: Sweet potatoes provide significantly more vitamin A and C than white potatoes.

Fold excess parchment over potatoes and cover pan with aluminum foil. Bake at 350°F until potatoes are tender, about 2 hours. Remove foil from pan, leaving parchment in place.