Preheat oven to 350°F. Beat egg yolks in a bowl with an electric mixer. Add condensed milk, lime juice and zest, and food coloring, if using. Pour into pie shell and bake 15–20 minutes or until set. Chill before spreading topping over top and serving. Refrigerate leftovers.

Recipe courtesy Meals For You. Visit http://www.MealsForYou.com.