Sentence:  A welcome, if humble, addition to Kampala's edible offerings is the <WSD>'rolex</WSD>'. This is nothing more (or less) than a freshly cooked "chapati" enhanced by a fresh omelette, chopped onions, green peppers and finely sliced cabbage. 
Meaning of the word marked with <WSD> tags:  An omelette served inside a chapati.