Unpeel the apricots and cut them into slices.
In a pan over medium heat, add sliced apricots, lemon zest, sugar, cinnamon.
Stir the mixture occasionally until the sugar dissolved for about 5-10 minutes.
In a blender, add the mixture after it becomes tender and blend it until it becomes smooth.
In a large bowl, add the heated mixture and place it in the refrigerator for 20 minutes.
Once the mixture is cooled down, mix heavy cream, milk, and vanilla into the chilled fruit mixture.
In a shallow sheet pan, pour the fruit mixture and put it in the freezer for 3 hours.
After 1.5 hours, remove the mixture from the pan and, again, blend it.
After the blending process, put the mixture again in the pan and in the freezer.
Place the mixture in the freezer overnight or for 4 hours. Then, take it out and apricot ice cream is ready to serve.