Chop the onion, celery and carrot, all very finely
Salt, pepper and flour the pieces of meat
Fry the onion, celery and carrot in olive oil in a casserole
To the one that is well fried, add the butter
To the one you fry again, add the meat
To which the meat is browned, add the white wine
Once the alcohol has evaporated (when it no longer smells of alcohol), add the broth, bay leaf, sage and tomato concentrate, previously diluted in a couple of spoonfuls of the same broth
Cook over a low heat for 1 hour
After one hour, add the potatoes and let another half hour pass
Add the peas and wait another half hour
Test for salt and rectify, if necessary