Slow Cooked Gyro with Pita Bread and Tzatziki

Name: Slow Cooked Gyro with Pita Bread and Tzatziki
Cuisine: European, Mediterranean, Greek
Ingredients: 4 tsp sea salt; 1½ tsp cayenne pepper; 2 tsp garlic powder; 2 tsp black pepper; 3 tsp oregano; 2 tsp mixed herbs; 1kg (2.2lbs) lamb mince (see note 1); The peel of several large potatoes; 1 tbsp oil; 1 tsp chilli powder; Sea salt & Pepper (to taste); Salad of your choice (we used onions, lettuce and cucumber)