Winter vegetable and bean soup with spicy sausage

225g rindless streaky bacon, cut into 5mm lardoons

2 tbsp olive oil

225g onions, chopped

300g carrots, cut into 5mm diced

215g celery, chopped into 5mm diced

125g parsnips, chopped into 5mm diced

200g white part of leek, chopped into 5mm slices thick, approx

1 Kabanossi sausage, cut into 3mm thin slices

1 tin of tomatoes

salt

pepper

sugar

1.7l  stock

225g Haricot beans, cooked

2 tbsp parsley, freshly chopped, to garnish