Bring milk, cream, 3 tablespoons of sugar and 1 pinch of salt to the boil in a saucepan, remove from the heat. Wash the rosemary, put 4 tips aside for decoration, pluck needles from 1/2 twig and chop finely. Add lemon zest and rosemary to the milk, let it stand for about 30 minutes
Whisk the egg and egg yolks and stir into the milk. Place 4 ovenproof moulds (approx. 100 ml content) in a fat pan of the oven, pour in egg-milk. Put the pan into the preheated oven (electric cooker: 125 °C/recirculating air and gas: not suitable) and pour boiling water over it so that 2/3 of the moulds are in water. Cook for 50-60 minutes. Carefully remove from the fat pan and allow to cool
Sprinkle evenly with 1 tablespoon of sugar each. Caramelise with a gas burner. Arrange the crème brûlée decorated with rosemary
Waiting time approx. 30 minutes