Step 1

Heat the oven to 450°F with a rack in the middle position. In a small bowl, stir together 1 teaspoon of oregano, the thyme, Aleppo pepper, fenugreek, paprika and 1 teaspoon each salt and black pepper. Sprinkle this mixture all over the pork, rubbing it into the meat; set aside at room temperature for about 15 minutes.

Step 2

Meanwhile, set a colander in a medium bowl and set a box grater in the colander. Shred the cucumber on the grater's large holes. Sprinkle the cucumber with ½ teaspoon salt, toss to combine and set aside to drain. In another medium bowl, stir together the onion, lemon juice and ¼ teaspoon each salt and black pepper; set aside.

Step 3

In an oven-safe 12-inch skillet over medium-high, heat 2 tablespoons of oil until shimmering. Add the pork and cook, turning occasionally with tongs, until browned on all sides, about 4 minutes total. Transfer the skillet to the oven and roast until the center of the thickest tenderloin reaches 135°F or is just slightly pink when cut into, 9 to 12 minutes. Remove the skillet from the oven (the handle will be hot) and transfer the pork to a platter. Let rest for about 10 minutes.

Step 4

While the pork rests, use your hands to squeeze the cucumber to remove excess water. In a small bowl, stir together the cucumber, yogurt, garlic, vinegar and 3 tablespoons of the remaining oil. Taste and season with salt and black pepper.

Step 5

To the onion mixture, add the tomatoes, the remaining 1 teaspoon oregano and the remaining 1 tablespoon oil. Gently toss to combine, then taste and season with salt and pepper. Transfer the pork to a cutting board. Thinly slice each piece and return to the platter. Serve the pork with the tzatziki, tomato salad and pita.