Chopped onion

Chopped onion is a food item that players can make by using a bowl on an onion, with a knife in their inventory. Doing so grants 1 cooking experience. Chopped onion is edible, and heals 200 life points when eaten along with a message stating "It's sad to see a grown man/woman cry."

Chopped onion is much more useful after it has been cooked to make fried onions, which heal 840 life points. Members can make these by using the chopped onion on a range or fire. This requires level 42 Cooking, and gives 60 experience points.

More commonly, they are combined with fried mushrooms to create mushroom and onion at Cooking level 57, which does not grant any cooking experience but does produce one of the two final ingredients required to make the more desirable mushroom potato.

They can also be combined with tomatoes to create onion and tomato and then ugthanki meat to create a kebab mix. This does not give any cooking experience but gives 40 xp when used with pitta bread. This creates an ugthanki kebab, which heals 190 life points.

It is also needed in a part of expanding the Thieving Guild, to make the Vial of stench.

Trivia

 * Due to a glitch from the toolbelt update on 6 December 2011 you could not make Chopped onions. You get the message "You need a knife to do that." regardless if you have a knife in your inventory, in your toolbelt, or both; making chopped onions a temporary rare. This was fixed on 13 December 2011.
 * During the time they were discontinued after the toolbelt update, they skyrocketed from a couple hundred gp to several million.