Start by whisking together the Greek yogurt, olive oil, juice from one lemon, minced garlic, dried oregano, salt, and pepper in a medium bowl. Add the chicken thighs to the bowl, ensuring each piece is well-coated with the marinade. Cover the bowl and refrigerate for at least 30 minutes. Marinating deepens the flavor, so don’t skip this step!
Heat a tablespoon of olive oil in your skillet over medium heat. Remove the chicken from the marinade (discard the excess marinade) and add the thighs to the skillet. Sear for about 2 minutes on each side until golden brown. Do not cook them fully yet. Set the chicken aside on a plate.
Using the same skillet, melt the butter over medium heat. Stir in the remaining garlic and sauté for about a minute, just until fragrant. Then, add the orzo and stir to coat it in the butter. Allow the orzo to toast lightly for 1-2 minutes.
Pour in the chicken broth, juice from the remaining lemon, and dried oregano. Bring everything to a boil, then reduce the heat to maintain a high simmer. Carefully place the browned chicken thighs back into the skillet, arranging them on top of the orzo.
Cover the skillet and cook for about 20-25 minutes. The chicken should be fully cooked, and the orzo will have absorbed most of the liquid. To check, the internal temperature of the chicken should reach 165°F (74°C).
Remove the chicken and fluff the orzo with a fork. Garnish with Parmesan cheese and fresh herbs, if desired. Serve immediately and enjoy!