Thanks all, so here's what I went with.
Dice 4 large onions and put in a pan with a couple of glugs of sunflower oil.
Add a teapoon each of cummin, chilli, and coriander powder.
Cook on a medium temp til the onions are clear.
Add in as much crushed ginger and garlic as you dare, I went with a 12cm piece of thick root ginger, and two whole garlics (I'm not talking cloves, I'm saying the whole thing).
Let that cook together for a bit, dice up a pepper, a couple of decent (Bengali) naga chillis and half a lemon. Add that in along with a tin of good quality italian chopped tomatos and a tin of water.
Slice up the sausage and add it in, cook on full heat for 15m and then simmer til the sauce thickens.
Grab 600g of pasta, stick it in a massive pan, add a few cloves of garlic, some salt and then cover in water and bring to the boil.
Turn the sauce off, add in some fresh coriander and a bit of salt.
When the pasta is done, drain, and put the pasta back in the saucepan on a medium heat, add in the sauce and mix it all together. After 2 minutes, turn the heat off and leave to stand for a few minutes while you go and set the table.
It's a lovely full on over the top assault of the senses. We've both been blocked up for a couple of days and are now feeling better and can actually breathe. There's enough to last us for lunch tomorrow
Sadly the wheel I fixed for Lyn has gone down again :*( Doh!