The obvious answer has been provided by Roger and Sheila (many thanks) in the form of a copy of Roald Dahl's Revolting Recipes inspired by various odious episodes from Dahl's vivid (and often lurid) imagination and depicted, of course, by Quentin Blake
Among possible dishes that I might have tackled (if I were going on the show, which, of course, I'm not!) are Snozzcumbers (cucumbers stuffed with tuna and poppy seeds), Stink Bugs' Eggs (hard boiled eggs with the yolks mixed with cheese, curry powder and chopped gherkins sprinkled with Asafoetida, an Indian herb that, apparently, smells of sweaty socks) and Crispy Wasp Stings, Wormy Spaghetti, Hot Frogs (served on a pool of green custard) and Mosquitoes' Toes and Wampfish Roes Most Delicately Fried which - because it's more fun - I'll leave you to imagine for yourselves.
The book is full of recipes on which children, in our obsessive age of health and safety, probably ought not to be let lose! For example, there are instructions for making Candy-Coated Pencils for Sucking in Class without any warnings to stop sucking when you get down to the paint and lead! And as for the Enormous [Savory] Crocodile...
...that uses a baguette and a wire coat-hanger (without its hook) to keep the 'jaws' open!
Suitable beverages include Frobscottle - liquidised kiwis and limes, drinking yogurt, lemonade, cream soda and a Redoxon tablet added just before drinking. This would be perfect for a Come Dine with Dahl experience, following which guests could settle down to a hilarious whizzpopping contest!!
Is to late, I wonder...?