Another thing to note that though its called "Indian food", there is no thing as an "Indian food", just like not everyone from India knows Hindi.
Indian food varies drastically as you travel from North to South, East to West. But for westerners, its mainly butter chicken/daal/Vindaloo/Paratha/Chapathi. For someone from South India, it will be Dosa/Appam/Idly/Idiappam/Pongal/Avial/Sambhar/Rasam or Fish curry. One of your challenges lies in catering to the Indian & Non Indians palettes alike. Greetings from Canada.