Who wants to know the secret of this sauce?

Ingredients (Serves 4):

5 -8 sprays light oil

3 carrots

50g celery

1 onion

500g lean diced beef from @the_butchery_kitchen

1 tin peeled tomatoes

150ml water + beef stock cube

50g black olives

1 yellow pepper

Seasoning

Oregano

Parsley

65g wild basmati rice per portion