n a saucepan, heat evaporated milk but do not let it boil.
Meanwhile, beat sugar and egg yolks until very light and voluminous.
Slowly add heated milk a little at a time, beating well after each addition.
Add vanilla, lucuma and heavy cream.
Mix until thoroughly combined.
Chill mixture in the refrigerator.
Churn in ice cream maker or alternately freeze in the refrigerator for 4 hours, stirring once an hour.