Preheat oven to 200°C/180°C/gas 6. Line a large baking tray with baking paper.
Place all the ingredients in a large bowl and use your hands to mix everything together until well combined.
Roll the mixture into 14 golf ball-sized meatballs. Place the meatballs onto the baking tray and bake for 18-20 minutes, or until lightly browned and the meatballs are cooked through.
Serve immediately with tzatziki sauce, garnished with dill and lemon zest, if desired.