The marinade for the chicken is so sensational that I use it even when I'm not making Gyros! This is fantastic for entertaining because you can just lay it all out for guests to help themselves. The smell when the chicken is cooking is incredible - you can really smell the oregano and garlic!
Place the Marinade ingredients in a ziplock bag and massage to mix. Add the chicken into the ziplock bag and massage to cover all the chicken in the Marinade. Marinate for at least 2 hours, preferably 3 hours, ideally 12 hours and no longer than 24 hours.
MAKE THE TZATZIKI
Cut the cucumber in half lengthwise. Use a teaspoon to scrape the watery seeds out. Coarsely grate the cucumber using a box grater. Then wrap in paper towels or a tea towel and squeeze to remove excess liquid.
Place cucumber in a bowl. Add remaining ingredients then mix to combine. Set aside for at least 20 minutes for the flavours to meld.
Brush the outdoor grill with oil, then preheat on medium high. Or heat 1 tbsp of oil in a fry pan over medium high heat.
Remove chicken from Marinade. Cook the chicken for 2 to 3 minutes on each side, until golden brown and cooked through (cooking time depends on size of chicken).
Remove the chicken from the grill / fry pan onto a plate. Cover loosely with foil and allow to rest for 5 minutes before serving.
ASSEMBLE GYROS
If your chicken thighs are large, you may need to cut them. Mine were small.
Get a pita bread or flatbread (preferably warmed) and place it on a piece of parchment (baking) paper (or you could use foil). Place some Salad down the middle of the bread, then top with chicken and Tzatziki.
Roll the wrap up, enclosing it with the parchment paper. Twist the end with the excess parchment paper to secure it and cut if desired.
I prefer to lay everything out on a table and let everyone help themselves.