The top isn't a mess of food. This is largely dependent on what you cook. Fish skin sometimes gets cooked on, glaze bubbles and chars, oil lights on fire and the top surface chars. Something like shrimp, tomato, or sausage will be fairly clean though, and nothing will cook on to the top.
Impairment of language, usually caused by left hemisphere damage either to Broca's area (impairment speaking) or Wernicke's area (impairing understanding, damage in rear parietal/temporal region in the left hemisphere)
Scientists think that the areas of speech production and comprehension are the ones more strongly perceived in the brain due to the fact that speaking and understanding speech are the skills humans master longer. Maybe, in the future, our brain will also develop specific areas for reading and writing.