In a large saucepan over medium-high heat, warm the broth.
Add the onion, cover, and cook until translucent and very
soft, about 45 minutes.
Uncover, lower the heat, and simmer for 1 hour, stirring
periodically. Add the vinegar and cook until the onion is
caramelized, about 1 hour longer. Use immediately, or
store in a glass or plastic container in the refrigerator
for up to 10 days.
Makes 2 cups.
Use as a pizza topping.
Per 2 T. serving: 41 calories, .2 g fat, 3.4%CFF.
