This is what I like to call Green Mash, it won't turn you into the hulk but tastes good. It started a few months ago when I was boiling some potatoes and broccoli and I left them on the heat for about 30mins whilst I was on the phone. When I returned the potatoes were overcooked and i just had to mash the lot together.
I've perfected the recipe so now it's not longer as mushy. You can mash whatever you like, I have even had carrots in there but I do not generally like red things as they leave a nasty taste in my mouth.