In a hot pan add oil, garlic, then onions, fry onions, add carrots, potatoes, celery, let them sweat.
Add water, kale, cover and simmer for about an hour.
Now add beans, tomato puree, check for seasoning and simmer for about 20 minutes stirring frequently so that beans don't stick to the bottom of the pan
Slice stale bread, place at the bottom of casserole, alternate layers of bread with soup so that bread is impregnated, cover and leave to stand for a day. To serve, remove the required quantity from casserole, heat up and enjoy!
