01 -
Prepare and blind bake pie crust at 375°F. Reduce temperature to 350°F.
02 -
Cook water, sugar, cornstarch, salt, lemon juice and zest until thick. Temper in egg yolks, cook until bubbling.
03 -
Remove from heat, stir in butter. Pour into warm crust.
04 -
Beat egg whites with cream of tartar until soft peaks. Add sugar and salt, beat to stiff peaks.
05 -
Spread meringue over warm filling, ensuring it touches crust edges.
06 -
Bake at 350°F for 20-25 minutes until meringue is golden. Cool 1 hour, then chill 4 hours.