Drain soaked chick peas & place in a casserole or soup pot. Add parsley, salt, spices, onion, oil & stock. Bring to a boil. Reduce heat, cover & simmer for 1 hour. Add the tomato paste & simer for another 1 hour. After 2 hours, add the potatoes & simmer for another 30 minutes. Add the lemon juice, check for salt & serve.