Preparation of the stock. Fill a saucepan with 500 ml of water and heat to boiling point. Then turn off the heat and immediately insert a filter bag containing 5g of smoked tea. Leave to infuse for 10 minutes, covering the saucepan (the infusion time may be adjusted, depending on the degree of intensity desired for the smoked aftertaste). Remove the filter bag and keep the liquid warm by covering the saucepan with its lid.