Falafel in Pita Bread with Tzatziki recipes

Name: Falafel in Pita Bread with Tzatziki recipes
Ingredients: 400g tin of chickpeas x2; 1 onion; 4 cloves of garlic; 1 cup of chopped up parsley; 1/2 tbsp salt; 1/2 tbsp cayenne pepper; 1 tbsp cumin; 1 tbsp ground coriander; 1 tbsp plain flour; 1tsp baking powder; 1/2 a courgette; about 300g of plain yoghurt; half a lemon; 1 or 2 cloves of garlic; 1/2 a cucumber