Preheat the oven to 400°F (200°C).

In a large mixing bowl, toss chicken breasts with olive oil, salt, pepper, garlic powder, and paprika until coated. Add mixed vegetables and spread on a baking sheet.

Roast in the preheated oven for 20-25 minutes until chicken is golden and internal temperature reaches 165°F.

In a mixing bowl, combine Greek yogurt, ranch seasoning mix, and fresh herbs. Stir until smooth.

With 5 minutes left, add pitas to the oven to warm.

Allow the chicken to rest for 3-5 minutes, slice it, then fill the warm pitas with chicken, vegetables, and dressing.