Whip the cream until it's almost stiff. Add the sugar a bit at a time while continually whipping, till really stiff. Add the egg yolks one at a time.

At this time, add the flavoring. I frequently use pureed fruit, instant vanilla pudding and mini chocolate chips, jello powder, etc. A big hit at a recent party was chocolate shavings and Grand Marnier (Note: Alchohol gives the ice-cream a "soft freeze" quality).

Whip the egg whites until stiff, then fold into the mixture. Pour into a freezer container (like Tupperware, etc.), put it in the freezer, and forget about it until about 6 hours later when it's ready. If you really want to trouble yourself, you can take it out halfway through and re-whip it to add more air and give it more volume, but I rarely do this anymore and it still comes out fine.