Here are directions if you can't get pasteurized eggs and are concerned about consuming raw eggs.
Mix cream and milk together in a saucepan and heat over medium-low heat.
Meanwhile, separately, whisk eggs in medium mixing bowl ’til light and fluffy.
Slowly whisk the sugar into the egg mixture, a little at a time until it’s thoroughly combined, then 1-2 minutes more.
When the cream/milk mixture reaches 140°, remove from heat.
Very slowly add in about 1/3 of the hot cream/milk mixture to the egg/sugar mixture, whisking quickly the whole time ’til blended.
(This “tempers” the eggs so they don’t scramble when added.)
Once thoroughly blended, add in the remaining cream/milk mixture.
Return custard to sauce pan and heat on medium low heat until the mixture reaches 175°.
(This kills off any harmful bacteria.)
Chill throughly until mixture is a minimum of 40°.
(You want it very cold so it freezes well in the ice cream maker.)
Freeze in ice cream maker following manufacturer's directions.