Tagore himself translated a number of his poems in English. Given that they were his poems and he was translating them himself (and creating some original uniqueness in the process), that could be close enough. Take a look at this:
http://www.sacred-texts.com/hin/tagore/gitnjali.htm
I don't know whether he ever wrote anything in English "from scratch".
Quite frankly, I think the combined requirement, of it being Indian poetry and originally written in English, is conflicting and silly. While some poets of Indian descent who wrote in English probably exist, I'd doubt those would be the best examples of either Indian culture or English language.
