BaÂ·sidÂ·iÂ·oÂ·myÂ·coÂ·ta. A phylum of fungi characterized by a spore-bearing organ, the basidium, that is usually a clavate cell that bears basidiospores after karyogamy and meiosis. Some mycologists have raised the class Basidiomycetes to the phylum or division level.
Add the onions to the skillet and increase the heat to medium-high. Cook until they begin to turn dark brown and somewhat soft, about 5 minutes. Add the oil and a pinch of the fine sea salt; continue cooking until the onions are soft and caramelized, about 5 minutes longer.. Soft, dark brown onions in five minutes. That is a lie. Fully caramelized onions in five minutes more.
Cook them in the oven with less fuss. The length of time you cook your onions in the oven will vary according to the results you want. For the texture of fried onions, roast them with a little oil for about 15 minutes at 425 degrees Fahrenheit. Caramelized onions take between 2 and 2 1/2 hours. Put your onions and a little oil in a lidded Dutch oven or casserole in an oven preheated to 400 F. Take them out of the oven and stir them every 15 minutes until darkened in color, and are sweet and slightly sticky.