Prepare your leeks by cutting off the dark green parts and the tips - discard these. Take the white part of your leeks and cut them in half, lengthwise. Rinse them well under cool running water and then chop them up.
2 leeks
Place the chopped white part of your leeks in a deep skillet along with the olive oil. Cook over medium heat for 8-10 minutes, stirring regularly so that your leeks don't burn.
⅓ cup olive oil
Add in the pork and cook over medium heat for 7 minutes; your pork should get browned on some sides. Check the temperature of the pork, it will determine how long to let it cook for the next step.
650 grams pork tenderloin, cubed
Next add the oregano, lemon juice, salt and pepper. Cover your pan and cook over medium low heat for approximately 3-4 minutes, or until the pork is cooked through. Internal temperature should be at least 145°.
¼ cup fresh lemon juice, 1½ tsp dry oregano, 1 tsp salt, ½ tsp pepper
If desired, drizzle with some extra olive oil and lemon juice, serve and enjoy!