This is the art of making your curry deceptively mild, but with hot spots that'll take your boots off..!! A phrase coined by Johny whilst munching one of my 'Mined' Jalfrazi's.

 There are several ways to mine your curry and they are all based on the same principle
Make a mild / medium strength curry and fill it with whole chillies. This way, the heat of the chillies is contained within, and only released upon eating. The key to a successfully mined curry is surprise, the eater must not be aware of the impending explosion of heat until it's too late. There are several ways of achieving this, outlined below be feel free to improvise...

Use small and hot chillies, they are harder to spot.

Use capsicum peppers, cut into the shape of chillies to disguise the mines ( decoys )

Scotch Bonnets are the hottest chillies out there, but these don't look like chillies and can be passed off as squashes ( Only once though!! )

Wrap the chillies in spinach leaves, plant into chicken chunks, hide it in the nann, you're your own boss....

Hide a lone chilli in the middle of an onion bargee before cooking

Feel free to adapt these techniques for your own requirements, and happy mining.
Alternatively, you can make Jan's napalm chicken and skip the bullshit!