Slice the cucumber into thin rounds using a mandolin or a sharp knife.
Thinly slice the red onion.
Shred the rotisserie chicken breast using two forks.
Add the cucumber, red onion, shredded chicken, and cottage cheese to a large bowl.
Drizzle in the olive oil and white wine vinegar.
Sprinkle in the salt, black pepper, and garlic powder.
Finely chop the fresh dill and add it to the bowl.
Toss everything gently until well combined and evenly coated.
Serve immediately or refrigerate for 30 minutes to let the flavors develop.
Notes
Use a mandolin for even slices: It makes the cucumber extra thin and crisp, but a sharp knife works too if you prefer more control.Cottage cheese adds creaminess: No need to blend it, just mix it in as-is for a rustic texture that works beautifully in this salad.Shredded chicken mixes better: Shredding lets the chicken catch more of the dressing and gives the salad a nice texture.Let it chill: A short time in the fridge helps the flavors come together and gives the salad a refreshing temperature.Make it ahead: This salad keeps well for up to 2 days in the fridge, making it perfect for meal prep or a quick lunch the next day.