Falafel burgers

INGREDIENTS

• 400g can chickpeas , rinsed and drained
• garlic clove , chopped
• handful of flat-leaf parsley or curly parsley
• 1 tsp ground cumin
• 1 tsp ground coriander
• 1⁄2 tsp harissa paste or chilli powder
• 2 tbsp plain flour
• 2 tbsp sunflower oil
• toasted pitta bread
• 200g tub tomato salsa , to serve
• green salad , to serve
• 1 small red onion , roughly chopped