Preheat the water to 150°F
Cut the bone out from the thighs, keeping the skin
intact. Season the inside of the thighs with salt and pepper. Place the
thighs, skin side down into a vacuum bag, making sure they lie
flat. Add sage, thyme and a pat of butter to the bag.
Cook for 2 1/2 hours.
Remove bag and dry thighs. Sear them over a hot grill or use a torch