A lot of whey gets made while making paneer. That extra whey is great in chapati and bread doughs; subjis, and dahl (only after the dahl is cooked and thickened). And here we are using it in a smoothie.
Just blend together bananas, whey, roasted nuts and ground cardamom in the proportions desired. It’s that simple. I’m not going to write out a regular recipe here. Just experiment, and when you blend it don’t put all the whey in at once. First blend the nuts and banana with a little whey, so that it is well blended and then thin it out with more whey, as desired