Furnace and Food

The most basic food would probably be beef, chicken, and pork. However if u cook them they become steak, cooked chicken, and pork chops. These types of food can be cooked in a furnace. You can also smelt ores in a furnace. I.E. gold. This is a pic of a furnace.

 The different types of fuel in a furnace affects how fast the thing is smelted or cooked. For example, a bucket of lava is the best.