Hello Lucky. I have bought these fairly recently, but they are not the same as the old original ones. The instructions on my packet are all over the place, side, back etc.
Let's go:-
First, make the lemon filling, ( instructions on packet side) and let this cool.
Meanwhile, pre-heat your oven to 150C( 140 C for fan assisted) 300F / or Gas mark 2.
Place a pre-baked pastry case onto a baking tray and pour in the cooled lemon filling.
Prepare your meringue
Mix 2 x med.egg whites until stiff. Whisk in 4oz caster sugar, ( 2ozs at a time) until all the sugar is combined and meringue forms peaks.
Spread meringue over filling, covering completely.
Bake in centre of oven for 25 minutes.
Serve warm or cold. If served warm, allow to rest for 15 minutes before serving.
Eat and enjoy
The old packets used to have a little lemon capsule that had to dissolve and I'm sure an egg yolk was added.
What you do with the 2 egg yolks is up to you??