Portuguese influenced Indian cooking and this influence can be seen in the Goan cuisine. Vindaloo style of preparation was introduced by the Portuguese in Goa. The traditional Portuguese dish, vindaloo evolved into a fiery, vinegary curry with the addition of various indian spices that was ground with vinegar to give it a unique taste, that is tangy, spicy and flavorful. This egg vindaloo has got a sweet and sour taste to it.
Note - Boiled potato, cut in quarters can be added along with egg.