01 - Combine milk, sugar, and salt in medium saucepan. Heat over medium until sugar dissolves and mixture is warm, avoiding boiling.
02 - Whisk egg yolks in separate bowl. Gradually pour 1/2 cup warm milk mixture into yolks while whisking constantly to temper eggs.
03 - Return yolk mixture to saucepan. Cook over low heat, stirring constantly, until custard thickens and coats spoon back (approximately 170°F).
04 - Remove from heat. Stir in heavy cream, peppermint extract, vanilla extract, and food coloring if desired.
05 - Pour mixture through fine-mesh sieve into clean bowl. Cover and refrigerate minimum 4 hours until completely cold.
06 - Churn in ice cream maker per manufacturer instructions. Add chocolate chips during final minutes of churning to distribute evenly.
07 - Transfer to freezer-safe container. Freeze minimum 2 hours until firm before serving.