preheat oven to 325°F

grind graham crackers into fine crumg form

melt butter, pour over graham crackers, mix with fork until completely moist. Press crumbs into pie pan, place in refrigerator.

combine condensed milk and eggs, mix until smooth. Add lemon juice and zest, stir until incorporated, pour into prepared crust.

Bake pie for 15 minutes. cool completely, serve chilled.