I usually make a chocolate Swiss roll.
The first step is to beat 4 eggs together with 115g sugar on a double boiler with warm (tap) water. I use a hand mixer for this, and it takes a long time, plus the machine gets really hot in the end.
My question is if there's a way to speed up the process? I haven't timed it (next time). I don't put the double boiler on a stove, it's just filled with warm water. My mixing bowl is plastic.