Melted Onions or Tomatoes

From Saveur magazine, Nov 2008. These incredibly soft, rich tomatoes and onions are great smeared on a circle of pizza dough instead of tomato sauce. Melted tomatoes make a great base for sauces, and melted onions add depth to soups or stews.

• Ready In: 3 hrs 10 mins
• Serves: 4
• Yields: 2 cups

Ingredients

• 1⁄4 cup olive oil
• 1  tablespoon kosher salt
• 4  thinly sliced yellow onions or 1  lb cherry tomatoes

Directions

1. 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%.