The main RuneScape Wiki has an article on: Curry
The Old School RuneScape Wiki also has an article on Curry.

Curry is a type of food that can be made at level 60 Cooking. Cooking one gives 125 experince and they heal 19 Hits. To make them you need 1 bowl of water, 1 potato, 1 piece of cookedmeat, and 1 pot of spice. Potatoes can be obtained from farms in Lumbridge, Draynor Village and East Ardougne. Pots of spice can be purchased or stolen from the Spice stall in East Ardougne. To make curry first fill a bowl with water, then add a potato, then add cookedmeat, then add spice. Finally cook it on a range. Accidentally burning it at this point results in burnt curry instead of completed curry.

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