Blend 1 tbsp of olive oil, 1 tsp of paprika, 1 tsp of salt, 1 tsp of cumin powder, 1 tsp of oregano, and 1 tbsp of Greek yogurt in a large bowl. Add cubed chicken, mix, and refrigerate for an hour.
Dissolve yeast in a cup of warm water in a small bowl and let sit for 5 minutes.In another bowl, combine 2 cups of all-purpose flour, 1 tsp sugar, and 1 tsp salt. Then gently add the yeast to the flour and mix. Mix until the dough isn't sticky. Form into a ball, coat with olive oil, cover, and let rise for an hour. Once the dough has doubled, divide into 4 equal parts on a floured surface. Let rest for 5 minutes, then shape into pitas and lightly brush with an olive oil, garlic, and oregano mixture.
For the chicken, skewer 6 pieces each and grill for 4-5 minutes per side.
Simultaneously, pan-fry the pita bread in olive oil for 1 minute per side.
In a small bowl, combine 7 ounces of Greek yogurt, minced cucumber, spring onions, minced garlic, and a dash of salt.
To assemble, place a pita on a plate and top it with chicken, tomatoes, lettuce, onions, and a spoonful of tzatziki sauce. Enjoy!