Soften the onions and garlic on a medium flame in 3-4 tablespoons of oil.
Throw in the carrots and celery and continue to sautee until everything is reduced and soft - around 10-15 minutes.
Add in the mince meat and mixed herbs. Season to taste, around 1 tsp of salt per 500g of mince is a good start.
Fry until the meat is brown and add the tomato paste.
No need to add water at this stage as the veg and meat will release water and we need this to be kinda thick.
Lower the heat, lid and leave for 30 minutes. Throw in a few bay leaves if you have them.