Having only eaten walnuts sporadically I was intrigued to find although the nut has culinary use, the shells are used for making dynamite, oil paint, plastics and helping to drill oil wells. I am sure the dynamite discovery must have come from some lateral thinker watching the walnuts 'explode' from their husks before falling to the ground.

The walnuts (roasted) go well with Parmigiano-Reggiano cheese and Champagne...

...but if you desire something tasty on a smaller budget try this salad from Ruth Pretty