Sauté the Base: In a large pot, heat half the olive oil and cook the onion, garlic, celery, carrot, and parsley until they start to color.
2/3 cup extra virgin olive oil, 1 onion, 2 garlic cloves, 1 stalk of celery, 1 carrot, a handful of parsley
Add Greens: Stir in the Tuscan kale, savoy cabbage, spinach, potatoes, and additional carrot.
1/2 head of savoy cabbage, a small bunch of spinach, 2 bunches of Tuscan kale, 1.3 lbs (about 2 cups) potatoes, 1 carrot
Tomato Paste and Simmer: Mix in the tomato paste and let the vegetables wilt, then add 2/3 of the cooked beans with about 4 cups of water. Season with salt and pepper. Let the soup cook uncovered on low heat for about 1 hour.
1.3 lbs (about 2 1/3 cups) cooked cannellini and borlotti beans, 1 tablespoon
Add Remaining Beans: Stir in the remaining beans towards the end of cooking.
Prepare Bread: Line the bottom of each serving bowl or cocotte with 2 slices of stale bread.
8 slices of stale Tuscan bread
Serve: Pour the hot soup over the bread, drizzle with remaining olive oil, and add a generous grind of black pepper.
Salt and black pepper