If you do not plan or fancy cooking the beans from scratch, you can use canned ones. They are as good. Use any beans type: if you don’t have butter beans, then use cannellini beans, or borlotti or any other beans will be as good.I prefer white beans like butter (my faves) or cannelini.
I was telling you about what my mum always used to do (still does) does extra, which is absolutely delicious - she caramelizes some onion in a generous quantity of olive oil and puts it on top to serve with - oh, I cannot tell you how delish that is, so if you like caramelized onion just go for it - yummy!
I sometimes use this beans (s)mush as a base for a nice steak instead of mashed potatoes or chips/rice and add some truffled mushrooms over - OMG it’s divine! Or, as seen in picture a side to a nice panfried or baked fish (any fish will do) woth some pickles or a nice salad. Oh, I am terribly hungry now.
What I mean by truffled mushrooms? I simply use truffles or truffle oil - amazing stuff (also a future recipe).
Nothing better than truffle and steak!