Pat the chicken thighs completely dry with paper towels, then season both sides with salt, pepper, and half the oregano. This step matters because moisture on the surface blocks browning—you want that pan to sear the meat, not steam it. I skip this and regret it almost immediately, so learn from my fumbling.
Heat olive oil in a large skillet over medium-high heat until the surface shimmers like glass. Once it's ready, add the chicken in a single layer without moving it around for 4 to 5 minutes—patience here builds flavor. The bottom should pull from the pan with a light golden sear when you first lift it.
Flip each thigh and cook the other side for another 3 to 4 minutes. You're not cooking them through yet; you're building a foundation of flavor. Transfer the chicken to a plate and set aside—we're building a sauce now.
In the same pan, add minced garlic, remaining oregano, thyme, and smoked paprika. Stir constantly for 30 to 45 seconds until the spices wake up and fill your kitchen with that herbaceous scent that says "dinner is happening." This blooming step releases the essential oils trapped in dried herbs, which is why it matters more than most cooks realize.
Pour in the chicken broth and scrape the bottom of the pan with a wooden spoon to loosen every stuck bit of browned chicken and seasoning. This isn't wasted effort—it's deglazing, and it means all that flavor joins the sauce instead of staying stuck to cast iron. Add the rice and stir once to combine, then return the chicken thighs to the pan nestled into the rice.
Cover with a lid and reduce heat to medium-low. Cook for 18 to 22 minutes until the rice absorbs most of the liquid and the chicken reaches 165°F at the thickest part. I check with an instant-read thermometer because guessing on chicken is how people end up eating lunch at 4 p.m. instead of dinner at 6 p.m.
Remove from heat and stir in the frozen peas, fresh lemon juice, and lemon zest. Let it sit covered for 2 minutes so the peas warm through without turning mushy. This final addition of fresh citrus is what transforms a fine dinner into one worth planning your week around.
Scatter fresh parsley over the top and serve immediately while steam is still rising from the rice.