if you use packet nasty gravy granules, you'll just end up with a below average dish that you could get in any frozen food section in the supermarket. It's also worth paying attention to the mash.
For the toad-in-the-hole, place the plain flour into a bowl and make a well in the centre. Whisk in the eggs and milk to make a smooth batter. Place in the fridge overnight. The next day, when you ...
Use gravy browning judiciously, otherwise the dish will become unattractively brown. If you cannot obtain it, substitute with caramel food colouring, Worcestershire sauce, instant coffee granules ...