Marinate the chicken: In a bowl, whisk olive oil, lemon zest and juice, garlic, oregano, thyme, salt, and pepper. Add chicken and toss to coat.
Let it sit 15–30 minutes at room temperature, or up to 6 hours in the fridge.
Cook the orzo: Bring a large pot of salted water to a boil. Cook orzo until al dente, about 7–9 minutes. Drain and rinse briefly under cool water to stop the cooking.
Toss with a drizzle of olive oil to prevent sticking.
Sear or grill the chicken: Heat a large skillet or grill over medium-high. Cook chicken 5–7 minutes per side, until browned and cooked through (internal temperature 165°F/74°C). Rest 5 minutes, then slice or cube.
Whisk the dressing: In a small jar or bowl, combine olive oil, red wine vinegar, lemon juice, Dijon, garlic, oregano, honey, salt, and pepper.
Whisk or shake until emulsified.
Prep the vegetables: Dice cucumber and bell pepper, halve tomatoes and olives, and slice red onion thin. Chop parsley and dill.
Assemble the salad: In a large bowl, combine orzo, vegetables, olives, herbs, and feta. Add half the dressing and toss gently.
Add the chicken: Fold in the sliced or cubed chicken.
Drizzle in more dressing to taste. Adjust salt, pepper, and acidity with a splash of vinegar or lemon if needed.
Serve or chill: Enjoy right away slightly warm, or cover and chill 30–60 minutes to let flavors meld. Top with extra feta and herbs before serving.