Preheat the oven to 450°F (230°C).
On a baking sheet, spread the zucchini, red bell pepper, and red onion in a single layer. Drizzle with 1/4 cup Italian dressing and toss to coat evenly.
Roast the vegetables for 15 minutes. Remove the baking sheet, add the cherry tomatoes, stir gently, and return to the oven for an additional 10 minutes.
While the vegetables roast, cook the orzo according to package directions. Drain and transfer to a large bowl.
Toss the cooked orzo with the remaining 1/4 cup Italian dressing.
In a lightly greased nonstick skillet, heat the Tyson® Grilled & Ready® chicken until warmed through, then roughly chop or shred if desired.
Add the roasted vegetables and heated chicken to the dressed orzo and toss to combine.
Sprinkle the salad with feta cheese and chopped fresh dill before serving.