Heat a little olive oil in a large frying pan, then add the onion and carrot. Cook gently for 5–7 minutes, stirring occasionally, until softened
Add the beef mince and cook until completely browned, breaking it up as you go
Add the garlic, tomato purée and Italian seasoning. Stir and cook for about 1 minute
Pour in the passata, crumble in the beef stock cube and add approximately 100ml water
Bring to a gentle simmer and cook for 20–30 minutes, stirring occasionally. If it gets too thick, add a splash more water
Meanwhile, cook your spaghetti according to the packet instructions
Taste the bolognese, season with salt and pepper if needed, then serve over the spaghetti with Parmesan