Sticking with a Sherry theme from The Beginning of the End, here’s another old sherry number from Rufus:
50 ml Oloroso Dulce Matusalem 30 Year Solera sherry 10ml Benedictine
10 ml sugar syrup
15 ml lemon juice
1 egg yolk
Shake hard first without ice then with. Double Strain. Dust with Nutmeg.