Greek Sausage (Loukaniko) Gyro
Ingredients:

4 pita bread rounds
Tzatziki
1 large onion, chopped</li>
2 medium tomatoes, diced</li>
Crumbled feta cheese
Sausage links, cut into rounds (any sausage works if you can't find Loukaniko)
Dried Oregano 

Place a piece of aluminum foil down on a flat surface. 
Put a piece of bread in the center of the foil. 
Spread a generous amount tzatziki across the middle of the pita bread. 
Top with onion, tomato, and some of the loukaniko. 
Sprinkle with feta cheese and another spoonful of tzatziki. 
Sprinkle some oregano over all the ingredients.

Roll the gyro sandwich and wrap it in aluminum foil so it can hold the shape. 
Repeat until you've used up all the pita bread.