If you make the omelet with two ounces of butter, and turn it over, put a couple of tablespoonfuls of jam on the omelet, and turn the half over the jam.

It is best to put the jam in the oven for a minute or two to take the chill off.
If you make the omelet with four ounces of butter, you must put the jam by the side of the omelet and let the thin part of the omelet cover it.

Of course, the question what jam is best for sweet omelet is purely a matter of taste.

Most good judges consider that apricot jam is the best, and if the sweet omelet itself be flavoured with a little essence of vanilla, the result is generally considered one of the nicest sweets that can be sent to table.

Strawberry jam, especially if some of the strawberries are whole, is also very nice.