Ribolitta

1/2 cup olive oil

1.5 cups chopped onion

1.5 cups chopped carrots

1.5 cups chopped celery

1 small bunch swiss chard (about 3/4lb), stems removed and chopped, leaves cut into bite-sized pieces

2 tbsp chopped garlic

1 tsp chili flakes

1 tsp dried rosemary

1 can (796ml) italian plum tomatoes (not san marzano), reserve liquid

6 cups water

1 can (540ml) white kidney beans

1 Parmesan cheese rind

1 bay leaf

salt and pepper

1/2 cup grated parmesan cheese

1/2 cup chopped parsley