Finely dice onion and mix with garlic powder and dill.
Put the cream cheese between 2 pieces of plastic wrap. Roll ¼-inch thick. Peel off the top piece of plastic wrap. Lay the slices of turkey on top of the cream cheese.
Cover with plastic wrap and flip over. Peel off the top piece of plastic. Sprinkle the onion mixture on top of the cream cheese. Sprinkle with the bacon and cheese.
Roll the pinwheels so that the turkey is on the outside. Refrigerate for 2 hours or longer. Thinly slice and serve with cucumber.