The oven is a functional block in 8Bitmmo, it can be bought from the store for 1 plat. Putting a block of sand on the oven, and turning the oven on. Will turn it into glass. Doing this with grass will turn it into dirt.[CIT] The oven can be used to cook the steak item. The same way you would cook anything else. However the steak cooks over time. 
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Sprite of the Oven, in the shop menu.

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