Soak the chickpeas overnight in 3 times the amount of water. Strain them through a colander and rinse under cold water. Then boil the chickpeas in water for about half an hour until they are soft.
Chargrill the baby marrows in a griddle pan until they are just cooked through and the char marks are visible.
For the dressing mix together the olive oil, red wine vinegar, lemon juic