Pie:
5 Tbsp. cornstarch 
1 1/2 cups sugar
1/2 tsp. salt 
2 cups boiling water
3 egg yolks (save whites for meringue) 
4 Tbsp. lemon juice 
2 Tbsp. butter 
2 Tbsp. grated lemon rind 
1 pie crust, baked 
Meringue:
1 Tbsp. cornstarch 
1/2 Tbsp. cold water 
1/2 cup boiling water
3 egg whites 
6 Tbsp. sugar 
1 tsp. vanilla