First, peel and chop the garlic. Put a little olive oil in the pot and sear the garlic, just enough it starts to smell, then add the beans and also use the canned liquid, parsley, salt and pepper.
Add 3 deciliters of water and cook for a few minutes.
Cook the macaroni separately according to the instructions on the packaging and drain.Blend the beans (you can use a stick mixer) to make them creamy.
Add the sour cream, which needs to be stirred in a cup previously, to make it smooth, and macaroni to the soup and season to taste with salt and pepper. Serve warm.