1. Whisk the egg yolks in a metal bowl until they are pale yellow.
2. Squeeze in the lemon juice, and add salt and Tabasco sauce.
3. In a separate pan, melt the Plugrá Butter.
4. Make a double boiler by placing pot over a boiling pot of water. In the double boiler, whisk the egg yolk mixture vigorously (don't scramble the egg) until the yolks have thickened and you can see the bottom of the bowl between strokes.
5. Remove from heat and very slowly add (dribble) the Plugrá Butter into the mixture and whisk until the Plugrá Butter has thickened the mixture.