What is Leaf vegetable?
[[File:Spinach leaves.jpg|thumb|[[Spinach]] leaves in a [[colander]]]] [[File:Kale-Bundle.jpg|thumb|A bundle of curly-leaf [[kale]]]] '''Leaf vegetables''', also called '''leafy greens''', '''salad greens''', '''pot herbs''', '''vegetable greens''', or simply '''greens''', are plant [[leaf|leaves]] eaten as a [[vegetable]]. They come from many different plants, but are similar in many way. They have similar [[nutrition]] and [[cooking]] methods. Almost one thousand species of plants with edible leaves are known. Most leaf vegetables come from short-lived [[herbaceous plant]]s, such as [[lettuce]] and [[spinach]]. Woody plants of some species also provide leaves that can be eaten. Leaf vegetables have many vitamins and nutrients. == Nutrition == Leaf vegetables are low in [[calories]] and [[fat]], and high in [[protein]], [[dietary fiber]], [[vitamin C]], [[vitamin A]], [[folate]], [[manganese]] and [[vitamin K]].<ref>{{cite web |url=http://nutritiondata.self.com/facts/vegetables-and-vegetable-products/2626/2 |title=Nutrition facts for raw spinach per 100&nbsp;g; USDA Nutrient Data SR-21 |year=2014 |access-date=15 September 2014 |archive-url=https://web.archive.org/web/20140920191548/http://nutritiondata.self.com/facts/vegetables-and-vegetable-products/2626/2 |archive-date=20 September 2014 |url-status=dead }}</ref> Leaf vegetables are very high in vitamin K.<ref>{{Cite book |doi=10.1007/978-1-4939-0606-2_15 |chapter=Prenylquinone Profiling in Whole Leaves and Chloroplast Subfractions |title=Plant Isoprenoids |volume=1153 |pages=213–26 |series=Methods in Molecular Biology |year=2014 |last1=Kessler |first1=F. |last2=Glauser |first2=G. |pmid=24777800 |isbn=978-1-4939-0605-5}}</ref> == Preparation == If leaves are cooked for food, they may be called '''boiled greens'''. Leaf vegetables may be [[stir frying|stir-fried]], [[stew]]ed, [[steaming|steamed]], or eaten raw. Leaf vegetables cooked with [[pork]] is a traditional dish in [[soul food]]. They are also commonly eaten in a variety of South Asian dishes su