If you are going to make my homemade tzatziki recipe, start by doing that first. If using store bought, procees to preparing the pork.
Slice pork loin as thin as possible. The easiest way to do this is when the pork is slightly forzen so that it is firm.
Place sliced pork in a shallow bowl and sprinkle oregano, paprika, salt, and ground black pepper. Grate in 2 garlic cloves. Lastly, pour oil over the seasoned pork and mix well. Cover with plastic wrap and let it marinade in the refrigerator for at least one hour prior to cooking or overnight.
About 30 minutes before cooking the pork, prepare the french fries. You can use a small bag of pre cut french fries or make them home made. For this recipe, I used 4 butter potatoes (peeled, cut, and deep fried in canola oil).
Once fries are ready, set them aside. Take the pork out of the refrigerator about 10 minutes before cooking. Heat a large skillet on high heat, once hot, decrease to medium heat and add sliced pork in a single layer. Cook about 5-6 minutes or until pork is fully cooked through. If you slices are thicker, cooking time may be longer. Remove pork from heat.
Decrease heat to low and lighty toast each pita bread in the same pan used to cook pork in, about 30 seconds on each side. This is optional but pita will fold better when warm.
To asseble, spread tzatziki on each pita bread, add pork, tomatoes, onions, and fries. Evenly distribute pork and french fries among 4 pitas. Tomatoes, onions, and tzatziki can be added per preference, as much or as little as you would like.