Falafel burgers - Good Food Middle East

Ingredients

• 250g chickpeas from a can
• 1 medium onion, finely chopped
• 2 garlic cloves, crushed
• 2 tsp ground coriander
• 2 tsp ground cumin
• small pack flat-leaf parsley, chopped
• 2 rounded tbsp plain flour
• 2 tbsp vegetable oil
• 100g houmous
• 4 burger buns, cut in half
• watercress, to serve