Get ready cucumbers: cut cucumbers in thin round slices and put them into a bowl. Season with a bit of salt and allow to spend 10,15 minutes to extract moisture.
Prepare dressing: In a small bowl, combine sour cream, apple cider vinegar, olive oil, garlic powder, dill, salt and pepper.
Combine: Eliminate unnecessary liquids in cucumbers, combine mix with the dressing and red onions until fully covered.
Chill: Refrigeration is necessary before the salad is prepared and it should be allowed to rest at least 15 minutes in the fridge to allow the flavors to combine.
Serve: Take extra dill and serve on ice as a chilled low-carb side dish.