[header] How to preserve artichokes in oil [title] Buy approximately 4.4 lbs. [step] ( 2 kg) of small artichokes that are all about the same size. Choose artichokes that are heavy for their size and have closed leaves, which signify that they are fresh. 
[title] Fill a large bowl with cold water, cut 4 or 5 lemons in half, and squeeze most of the lemon halves into the bowl of water. [title] Extract the hearts from the artichokes.