Crust:

1 1/4 c. graham cracker crumbs
1 tbsp. sugar
1 tsp. cinnamon
3 oz. melted butter (3/4 stick)

Preheat oven to 375°F. Mix and add melted butter. Press into 9-inch pie plate.

Bake 8 minutes or until light brown.

Filling:

2 limes, finely grated
1 c. lime juice
4 eggs, separated
2 (15 oz.) cans sweetened condensed milk
pinch of salt

Mix rind and lime juice. Stir egg yolks just to mix. Gradually mix in condensed milk, then juice mix. Stir until smooth. Add salt to egg whites; beat until stiff. Fold whites into egg yolk mixture. Crust will not hold all the filling. Freeze pie 30 minutes, then pour balance, mounding high in center. Could try putting in a 9 x 13-inch pan.