Cut chicken breasts into ¼ inch-thick slices. Toss with salt, pepper, garlic, and oregano, and allow to sit while you prep the other ingredients.
Heat 1 tablespoon of olive oil in an 8- or 10-inch skillet over medium high heat, tilting the skillet to coat the bottom of the pan.Add chicken in a single layer, working batches if necessary.
Allow the pieces to get nice and brown on the first side (2-3 minutes). Turn them over, and cook for 30 more seconds until no longer pink on the second side. Remove them to a clean bowl or plate. They may not be cooked all the way through, but they will finish cooking with the orzo.
Reduce the heat to medium, and add the remaining 2 tablespoons of EVOO.
Add the onion and saute until translucent. Add the garlic and cook for 1 more minute.
Stir in the orzo to coat with the aromatics, then add 1/2 teaspoon kosher salt, water, and lemon juice. Bring to a simmer and cook for 3-4 minutes, or until the liquid begins to absorb into the pasta.
Mix in the cooked chicken with any juices, the sundried tomatoes, and the kalamata olives. Bring back to a simmer, then turn to medium low. Cover and cook for 10-12 minutes, until the orzo is tender and most of the liquid has been absorbed.
Remove the lid and top with fresh black pepper, feta cheese, chopped parsley, and dill. Enjoy!