You mean... Grafting a second tap root?
Melons are often grafted to a different root-stock, yes, as are fruit trees etc but this is about hardiness, resistance, etc etc. And they are trees. I've never heard of anyone grafting a tap-root. It seems like it would be a hindrance (if even remotely...
Fussily, salted and oiled then sealed in a hot pan and finished in the oven on 180c for about 10 mins or until medium-rare.
That, or sous vide.
Do you like coriander?
I know you said "established" but "eBay seller" is all you might need to worry about. Hope the seeds turn out to be true for you.
Fyi, here's a good resource on the identification of different Capsicum species:
http://junglerain.com.au/chilli-info/indentifying-chilli-species