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Ingredients
- 14 cup olive oil
- 1 tablespoon kosher salt
- 4 thinly sliced yellow onions or 1 lb cherry tomatoes
Method
- Place oil, salt and onions or tomatoes in a saucepan.
- Cut a circle of parchment paper which fits snugly inside the saucepan.
- Place parchment down on top of the cooking sauce.
- Cook very slowly, over a low flame, for several hours, until reduced in volume by 50%.