Vegetarian

Cook drained broad beans in fresh unsalted water in a large saucepan, covered, adding water to keep them covered; simmer gently 2–2½ hours until tender and salt after they soften
Let the cooking liquid reduce so the sauce thickens
Remove a ladle or two of beans, mash them with some cooking liquid, and stir the mash back into the pot to thicken the sauce
Transfer the beans to soup bowls and sprinkle with chopped parsley
Pass around the dressing ingredients: olive oil, quartered lemons, crushed garlic, and ground cumin for people to add themselves
Crush the beans gently with a fork so they absorb the dressing before eating