Cut the chicken breast into 1-inch bite-sized cubes and place them in a medium mixing bowl.
Add the yogurt-based creamy Caesar dressing to the chicken and toss thoroughly until every piece is evenly coated.
Preheat your air fryer to 400°F and arrange the marinated chicken in a single layer in the basket.
Air-fry the chicken for 10-12 minutes, shaking the basket halfway through, until the edges are golden and the chicken is cooked through.
While the chicken is cooking, whisk together the Greek yogurt, red wine vinegar, and chopped fresh dill in a small bowl to create a tangy topping.
Prepare the vegetables by dicing the cucumber, halving the cherry tomatoes, and finely mincing the red onion.
Assemble the bowl by placing the cooked quinoa at the base and topping it with the air-fried Caesar chicken, cucumber, tomatoes, and red onion.
Finish the bowl with sliced avocado, a dollop of the dill-yogurt sauce, and a sprinkle of sea salt and black pepper.