Pat your chicken breasts dry with paper towels, then season both sides with salt, pepper, and half the thyme. Heat olive oil in a large skillet over medium-high heat—you want it hot enough that the chicken sizzles immediately when it touches the pan. This searing step builds flavor through browning, so resist the urge to move things around for the first three minutes.
Sear the chicken for three minutes per side until golden on the outside (it won't be cooked through yet, which is exactly right). Transfer the chicken to a plate and set it aside—I always feel nervous at this point, but trust the process because it comes back together beautifully.
In the same pan, add diced onion and cook for two minutes until it softens slightly and smells sweet. Add minced garlic and cook for one minute more, stirring constantly so it doesn't burn—garlic turns bitter fast, and one burnt batch ruins your whole dinner.
Pour in the chicken broth and add the orzo, lemon zest, remaining thyme, and the lemon juice. Stir everything together, then nestle the seared chicken back into the pan so it sits partially submerged in the liquid. This combination cooks the chicken through completely while the orzo absorbs all that beautiful flavor from underneath.
Bring everything to a simmer, then reduce heat to medium and cook for 18-22 minutes until the orzo is tender and the chicken reaches 165°F at its thickest point. The liquid should reduce by about half—if it's still soupy when the pasta's done, turn the heat up slightly for the last three minutes. I learned this timing trick from Marco when he stressed about watery pasta, and it changed my one-pan game entirely.
Add the halved cherry tomatoes and cook for two more minutes just to warm them through and let them release their juice. Taste the broth and add more salt or lemon if you need it—your palate is the real expert here, not a recipe.
Remove from heat, then stir in fresh parsley and top with crumbled feta cheese and toasted pine nuts right before serving.