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)
Language is a bit more complex; it is believed that most language processing happens in the temporal lobe, but Broca's area in the left frontal lobe is associated with spoken language, and Wernicke's area (the main area of the brain associated with understanding language) is actually between the parietal lobe and the temporal lobe.