In a small bowl, cover the gelatin sheet with cold water. Let bloom until pliable, about 5 minutes. Squeeze out excess water.
Combine the lemon juice, sugar, eggs, egg yolks, and salt in the bowl of a mixer. Heat over a double boiler, stirring, until the mixture reaches 175°F/80°C.
Remove the bowl from the heat and stir in the gelatin. Let cool to 130