1. Make the Gyro Meat:

• In a large mixing bowl, combine the ground lamb or beef, grated onion, minced garlic, ground cumin, ground coriander, paprika, ground cinnamon, dried oregano, salt, and black pepper. Mix well until all the ingredients are evenly incorporated.
• Cover the bowl and refrigerate the meat mixture for at least 1 hour to allow the flavors to meld.

2. Shape and Cook the Gyro Meat:

• Preheat your grill or a grill pan over medium-high heat.
• Take the seasoned meat mixture and shape it into a loaf or oval shape. If using a grill, you can shape it directly on skewers.
• Grill the meat for about 10-15 minutes, turning occasionally, until it’s fully cooked and has a nice char on the outside. Alternatively, you can cook it in a pan if you don’t have access to a grill.

3. Make the Tzatziki Sauce:

• While the meat is cooking, prepare the tzatziki sauce. In a bowl, combine the Greek yogurt, grated and drained cucumber, minced garlic, fresh lemon juice, chopped dill, salt, and black pepper. Mix well and refrigerate until serving.

4. Assemble the Gyros:

• Warm the pita bread or flatbread in the oven or on the grill for a minute or two.
• Slice the grilled gyro meat thinly.
• To assemble each gyro sandwich, place a warm pita or flatbread on a plate. Add slices of gyro meat, sliced tomatoes, sliced cucumbers, sliced red onion, and fresh or shredded lettuce.
• Drizzle a generous amount of tzatziki sauce over the top.
• If desired, add optional toppings like crumbled feta cheese, olives, and hot peppers.

5. Serve:

• Fold the pita or flatbread around the filling to create a gyro sandwich.
• Serve your homemade gyros immediately, while they are still warm and fresh.