Melted Onions or Tomatoes

Directions

1. 1
   Place oil, salt and onions or tomatoes in a saucepan.
2. 2
   Cut a circle of parchment paper which fits snugly inside the saucepan.
3. 3
   Place parchment down on top of the cooking sauce.
4. 4
   Cook very slowly, over a low flame, for several hours, until reduced in volume by 50%.