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)
The cerebral cortex (the largest part of the brain) is responsible for higher thought processes. The two symmetrical hemispheres of the cerebrum are divided into four lobes (frontal, parietal, occipital and temporal), with each lobe being responsible for various functions.