The cheese is located behing Sir Ogledon in the tent on a few tables. Each piece of cheese will reduce your health by ~10% and each cheese wheel you eat will reduce your health by about ~30%. In order to do this quickly eat three cheese wheels, then drink a healing draft. Repeat the process until you have eaten 24 servings of cheese. If you run out of cheese wheel you can eat the small pieces it just takes longer. Careful not to over eat!