Key Lime Pie

This recipe is from my friend Cherre.
1 can sweetened condensed milk ( fat free works)
4 egg yolks
1/2 c key lime juice fresh or from bottle
2 tsp lime zest
Whisk ingredients and add drop of green food coloring if desired. Pour into graham cracker crust. Bake at 325 for 15-17 mijnutes or until center looks set but jiggles like jello.
Cool and then refrigerate.