I do mine in a wok and it takes about 3 hours.
Fry a kg of mince and 3 onions + garlic, drain off the excess fat, add a tin of toms, chopped fresh toms, courgette/marrow and tomato puree, add cup of water and a sachet of chilli mix, let this bubble away for a while….. Then add some frozen veg such as peas and or runner beans, carrots etc, add some more water, oregano, chilli powder and as many chopped chillis as you can handle, 2-3 teaspoons of muscavado sugar and plenty of cinnamon powder, a few chunks of dark chocolate….add water so the wok is pretty full then keep it on the simmer and let it reduce down, add a few tins of kidney and harricot beans with about an hour to go.
You can put in whatever you want such as shrooms or different veg to bulk it up, awesome on rice and even better the next day on chippy chips and rice. I leave it in the wok untill the next day and haven’t had the squits yet, fausty pumps on the other hand….
CHILLI DONE, BOSH!