No! Not water cress and carrots! Bacon, butter, high meat content sausages, salmon, steak, chicken, fish, all the veg you can handle, cheese, cream, eggs, peanuts, nuts of any kind, small quantities of berries, lentils, pulses.
Just avoid bread, pasta, rice and potatoes as well as sweet stuff and you'll be fine! If you're carrying any excess weight it'll slide off!
The link
@jack412 has sent you is by a practising doc in Sweden, who specialises in diabetes and obesity and he's fab! Good luck!