01 - Bring a large pot of generously salted water to a rolling boil. Add the pasta and cook according to package directions until al dente. Drain thoroughly, rinse under cold running water to halt cooking, and set aside to cool completely.
02 - Pat the chicken breasts dry and season both sides evenly with garlic powder, salt, and black pepper. Heat 1 tablespoon of olive oil in a skillet over medium heat. Place the chicken in the pan and cook for 6 to 7 minutes per side until deeply golden and cooked through to an internal temperature of 165°F. Transfer to a cutting board and rest for 5 minutes before cutting into bite-sized cubes.
03 - In a mixing bowl, combine the mayonnaise, Dijon mustard, honey, apple cider vinegar, and olive oil. Whisk vigorously until the dressing is smooth and emulsified. Season with salt and pepper to taste, adjusting the acidity or sweetness as desired.
04 - In a large serving bowl, combine the cooled pasta, cubed chicken, halved cherry tomatoes, diced cucumber, diced red bell pepper, sliced red onion, and baby spinach. Pour the honey mustard dressing over the top and toss gently until every component is evenly coated.
05 - Plate the salad immediately, garnishing with fresh herbs if desired. For deeper flavor development, refrigerate for at least 1 hour before serving. This dish pairs excellently with a crisp Sauvignon Blanc or a light lager.