Double *baked* is possibly a misnomer, as the first baking is in the microwave!
For each person:
One large baking potato (e.g. Maris Piper)
Two tablespoons of creme fraiche
Two teaspoons of red pesto
A large handful of grated cheddar cheese
Prick the baking potato all over with a fork or other handy sharp implement, and microwave potato for around 8 minutes (for an 800W microwave)
Preheat oven to 230 C
Meanwhile, mix the creme fraiche, red pesto and cheese in a bowl
Remove potato from microwave, carefully scoop flesh from skin, leaving a border of flesh in the skin of around 1/4 - 1/2 cm. Put flesh into the bowl with the cheese mixture.
Mash the potato into the cheese mixture, until fairly smooth.
Replace cheesey potato mixture into the potato skins.
Put potato halves on a baking tray, bake in the oven at 230 C for around 10 minutes, or until the mixture is bubbled and browned.
Eat, with your choice of delicious accompaniments!