I use a pressure cooker to cook my beets. If you don’t have a pressure cooker, you can boil them in a regular large pot, it will just take much longer.
Place entire beet, not peeled or cut, into pressure cooker. Almost cover beets with water. Bring to a boil and let it cook for 1hr. Carefully release steam from pressure cooker. Drain beets. Here, I run some cold water over them so I can peel them. The skin comes right off simply with my fingers. Cut into chunks. Place butter on top, and stir the beets to get them all coated with the butter. Add salt to taste (takes quite a bit). Mmmm.