The correct spelling is Kerala (popularly known as God's own country!)

Most Indian restaurants have a few selections of Keralite food but (to the best of my knowledge) there is no restaurant that specialises in keralite food alone and even if there is, I (a keralite in doha since birth)haven't heard of it which means its not good.
More importantly, keralites generally don't opt for keralite food at restaurants(why would they when they get the best of it at home!!)

Good luck