Basic mixture: 1 big egg, 84 grams sugar, 250 ml cream, 125 ml milk. Blueberry mixture: 125 grams blueberry, 55 grams sugar, juice of 1/4 lemon. Allow the blueberry mixture to stand 2 hours in the refrigerator and stir occasionally then mash it. Whisk the egg up 2 minutes long, then stir in the sugar bit by bit and keep on stirring about 2 minutes until sugar dissolves. Add cream, milk and blueberry mixture and mix all up well. Put all into the ice cream maker and let the machine do its work.