I really enjoy cooking like my mom used to in cast iron skillets.  Biscuits and gravy from scratch is my favorite!  Good southern cooking.
Who invented cooking?
I'm sure that the invention of cooking with the use of fire came from humans thousands of years ago.  I don't believe any one person can be credited with the invention of cooking.
Can you provide me with some methods of cooking?
Methods of cooking can be done in several ways nowadays.  You have grills, griddles, microwave ovens, ovens, infrared rotating pizza cookers, toasters, toaster ovens, and sometimes we cook outdoors over an open fire when we are camping.