How is a sandwich digested at each organ of the digestive system?

I need help to rewrite an assesment answer that was partially wrong due to missing parts out ie: enzymes/organs. How would I re write this. Q: Describe how a sandwich of wholemeal bread, butter, ham and tomato is digested at each organ of the digestive system. Only show the digestion of the major nutrients making up the sandwhich. consider, major nutrients in each food component, digesitve juices that are secreted at each stage and where from, what enzymes are, two physical processes involved in the digestion. (this is hard ;-(