L.A.
Carmalized onion dip?
http://sharedappetite.com/caramelized-onion-dip/
2 large yellow onions, cut in half and sliced very thinly
3 tablespoons unsalted butter
1 tablespoon olive oil
Kosher salt
Freshly ground pepper
Cayenne pepper (optional)
4 ounces cream cheese, at room temperature
1/2 cup sour cream
1/2 cup mayonnaise
Chives, finely chopped, for garnish (optional)