Toad in the Hole was 1st recorded in print in 1787, named after a pub game of discs being thrown into holes on a table. Have a look
Here
And Wikipedia reckons that.....
In medieval times meat was in short supply. Residents in some impoverished villages, particularly those in areas such as the Carrs regions around selby, took to eating frogs and toads. They would often supplement the protein with a baked mixture of powdered grains to protect the delicate meat from the heat of the fire. Children and the poorer members of the community would be given the remnants of the baked grain coating and be required to extract the "toad from the hole".
I think on the whole I prefer sausages !