Battuto for meat stew or soup

For ➍
1 onion, chopped
1 carrot, chopped
2 tbs celery leaves, chopped
1 tbs parsley, chopped
2 cloves garlic, chopped
2 tbs chopped pork*
olive oil

Mix and brown in hot olive oil. 
Use as a base for a meat stew, or add some more vegetables and broth to make a soup.

*Optional.
In Roman cooking, a battuto is an initial preparation, that can be developed into a sauce, a stew or a soup. This basic battuto works also well a pasta sauce.
The ingredients are flexible, as in an Italian fish parcel.
The minestra col battuto soup uses a finely cut battuto, with onion, celery, garlic and a bit of parsley and basil added for more flavour. Read the Lazio variation.