<human>: Here is a goal: How to Make the Filling for North Carolina Lemon Pie

How would you accomplish this goal?

OPTIONS:
- To make filling for North Carolina Lemon Pie, mix condensed milk, egg yolks, heavy cream and lemon zest in a bowl.
- To make filling for North Carolina Lemon Pie, separate condensed milk, egg yolks, heavy cream and lemon zest in a bowl.
<bot>: To make filling for North Carolina Lemon Pie, mix condensed milk, egg yolks, heavy cream and lemon zest in a bowl.