Make the Marinade/Dressing: In a bowl or jar, whisk together olive oil, lemon juice, red wine vinegar, garlic, oregano, basil, Dijon, honey, salt, and pepper.
Taste and adjust acidity or salt. Set aside 1/3 cup to use as the dressing and the rest for marinating the chicken.
Marinate the Chicken: Place the chicken in a zip-top bag or shallow dish. Pour the remaining marinade over it, toss to coat, and chill for 20–30 minutes while you prep the other ingredients. Don’t marinate for more than an hour or the lemon can toughen the meat.
Cook the Pasta: Bring a large pot of salted water to a boil.
Cook the pasta until just al dente according to package directions. Drain and rinse quickly under cool water to stop cooking. Toss with a teaspoon of olive oil so it doesn’t clump.
Cook the Chicken: Heat a grill pan or skillet over medium-high.
Cook chicken 5–7 minutes per side (thighs may need a bit longer) until the internal temperature reaches 165°F (74°C). Rest 5 minutes, then slice or cube.
Prep the Veggies: While the chicken cooks, chop tomatoes, cucumber, onion, bell pepper, and olives. Pat the cucumber and tomatoes dry with a paper towel to limit excess moisture in the salad.
Assemble the Salad: In a large bowl, combine cooked pasta, veggies, olives, and feta.
Add the sliced chicken and herbs. Pour in the reserved dressing and toss gently until everything is coated.
Adjust and Chill: Taste and add a pinch of salt, more lemon, or a splash of vinegar if needed. For best flavor, chill at least 20 minutes before serving.
Garnish with extra herbs and a crumble of feta.