Whisk together the sweetened condensed milk, lime juice, zest, vanilla, egg, and egg yolks. Pour into the baked crusts (about 45 g of filling per pie). Bake for 15-18 minutes, or until the filling is set. Remove from oven and allow to cool completely. Chill the pies for at least 2 hours or overnight.
1 can sweetened condensed milk, ⅓ cup lime juice, 1 tbsp lime zest, 1 tsp vanilla extract, 1 egg, 2 egg yolks