First, make the Tzatziki. Peel the cucumber then grate with the large blades of a box grater. Transfer into a sieve and sprinkle with ¼ teaspoon sea salt. Let it sit for 10-15 minutes to drain its liquid. Using the back of a wooden spoon, press to squeeze out as much moisture as possible.
Finely chop the dill and mince 1 clove of garlic. Place the Greek yogurt, 2 tablespoons olive oil, apple cider vinegar, garlic, dill, and grated cucumber in a medium-sized bowl. Thoroughly stir to combine.
Transfer to a serving dish. Drizzle with extra virgin olive oil for extra presentation marks (optional). Leave to chill in the fridge while you prepare the koftas.
Add the ground lamb to a large mixing bowl. Grate the cheese using the fine side of a box grater. Crack in the egg, mince 2 cloves of garlic, and finely chop the fresh parsley. Add them to the ground lamb, along with the ground cumin, cinnamon, smoked paprika, dried oregano, ¼ teaspoon sea salt, and a good grind of black pepper.
Use your hands to thoroughly combine all the ingredients together. It should all gather into a ball. If your mixture feels dry, or not holding shape, add another egg. If it feels too wet, add more almond flour.
Divide the mixture into 4 large or 8 smaller equal-sized balls. Shape into flat sausages, about 1 inch thick. Thread on a metal skewer if grilling or BBQing (optional) and place on a baking tray, then transfer to the fridge for 15 minutes so they firm slightly, or until ready to cook.
Preheat a griddle or frying pan over medium-high heat. Place the koftas on the griddle pan and fry until the outside is brown and crispy. About 5 minutes on each side.
Transfer to a serving dish. Serve with lemon wedges, chopped parsley, extra grated cheese, avocado slices, and tzatziki, then wrap it all up in lettuce and enjoy!