Preheat your oven to 200C
In your oven proof dish add 1 tbsp oil and your sausages. Place this in the oven for 10 minutes or until the sausages are slightly browned.
Whilst your sausages are cooking make your yorkshire pudding batter mixture. Beat/whisk your 3 eggs into your cornflour in a mixing bowl.
Once thoroughly combined, gradually add your milk a little at a time. Mix together - I use a non-electric whisk for this but you could use a electric hand mixer if you like.
Quickly remove your dish from the oven and pour your mixture over the top. Immediately put this back in the oven. (It is very important you do this quickly as the yorkshire pudding mixture needs to instantly hit the hot oil)
Place back in the oven for about 25 minutes until the yorkshire pudding is golden and really big! (Never open the oven during cooking to check if you can help it)
Serve up with mashed potato, veggies and lots of gravy.
* Always make sure your dish is VERY hot when you pour in the yorkshire mixture.