Turkey & Courgette burgers

Ingredients

• 500 g minced turkey
• 1 large courgette (coarsely grated (about 200g total))
• 1 whole egg
• 2 tablespoons mint (chopped)
• 2 tablespoons coriander (chopped)
• 2 cloves garlic (crushed)
• 1 teaspoon ground cumin
• 1 teaspoon salt
• 1/2 teaspoon ground black pepper
• 5-6 spring onions (thinly sliced)
• 4-5 tablespoons vegetable oil
• 100 g sour cream
• 150 g Greek yoghurt
• 1 teaspoon lemon zest (grated)
• 1/2 tsp chilli powder
• 1 tablespoon lemon juice
• 1 small garlic clove (crushed)
• 1 tablespoon sumac
• 1/2 teaspoon sea salt
• 1/4 teaspoon ground black pepper
• 1 1/2 tablespoons olive oil