Step by step

Fry the chopped veg together in a heavy casserole or terracotta saucepan

The best match for Bolognese sauce is undoubtedly homemade tagliatelle: alternatively, you could use spaghetti or some other long pasta.
The origin of the Italian term for this meat sauce – ‘ragù’ – is, as you might guess, French: it comes from the word ‘ragoût’ which means ‘stew’.