Mix the ingredients well in a large glass or ceramic bowl.
Smart Cooking automatic cooking option
Place the bowl on the third shelf of the oven. Select the Creme> English Cream program
Combined microwave cooking option
In a saucepan, bring the milk and sugar to the boil together with the lemon zest. In a 500 ml pyrex bowl, minimum weight and 1 liter maximum weight, mix well the egg yolks, cream and vanilla. Once it has boiled, using a whisk, gradually incorporate the milk with the egg yolks and cream. Remove the lemon zest and mix well with an immersion blender. Clean the edges of the bowl well. Place the bowl on the third shelf of the oven and cook in Micro mode (300W microwave power) for 3 minutes. Remove the bowl from the oven and mix the cream with the help of a marisa. Repeat the cooking cycle four times. Pass through a colander before serving.