Prepare the fresh ingredients by dicing the cucumber, mincing the red onion, chopping dill, slicing olives, and crumbling feta cheese.

In a large bowl, combine the dressing ingredients: mayonnaise, Greek yogurt, lemon juice, Dijon mustard, garlic powder, and Greek seasoning. Whisk until smooth.

Open and drain the canned chicken. Add to the bowl with the dressing and fold gently to coat the chicken.

Fold in the diced cucumber, minced red onion, crumbled feta cheese, and sliced olives gently.

Decide whether to serve immediately or refrigerate in an airtight container for up to three days.