Begin by finely slicing one English cucumber and one medium red onion, ensuring they are thin for a delightful crunch. If you're using fresh garlic, mince a clove for added flavor.

In a large mixing bowl, combine the sliced cucumber, red onion, and diced or shredded cooked chicken breast. Next, add a generous scoop of low-fat Greek yogurt, minced garlic (or garlic powder), a drizzle of olive oil, and fresh lemon juice. Season this vibrant mixture with salt and pepper according to your taste.

Cover the bowl and shake vigorously for about 30 seconds, or use a spoon to stir until every ingredient is well-coated in the dressing.

Serve immediately in chilled bowls or cover and place in the fridge for up to two days.