Heat oil in a large pan and gently fry the onion for about 3-4 minutes until soft.
Add the garlic and mince and fry until well browned.
Stir in the mixed herbs, and tomatoes then add the KNORR Beef Stock Pot, water and Worcester sauce.
Bring to the boil then reduce the heat and allow to simmer for about 30 minutes, stirring occasionally.
Serve the bolognaise over the cooked spaghetti in bowls and top with grated cheese if desired.