Chop the pork into cubes and fry in a hot pan with some oil until golden brown.
Chop the onions and fry gently with a clove of garlic for 4-5 mins (in the same pan as the pork).
Add the tin of tomatoes and a good measure of the puree (about a tablespoon) with a heaped teaspoon of sugar and bring to the boil, then simmer.
(I would be tempted to add a stock cube of either pork or vegetable at this stage).
Add as much chillies as you like with a sprinkling of the basil to the pan.
Half the mushrooms or leave them whole if they are the button variety and pop them in too.
Leave to simmer for 30 mins.
Add thinly sliced green pepper and season with a little salt and pepper and leave again for 15 mins.
Boil up some spuds and mash them together with some very finely sliced spring onions and a little parsley and pepper.
(add a raw egg to the mash when your giving it a good squish ... it's lovely)
Plop onto a plate and enjoy