If you can, prepare the batter in advance — an hour or two is perfect.
Whisk the eggs in a bowl or jug (I like using a jug because it’s easier to pour the batter into the muffin tin).
Add the flour and salt, and whisk until well combined.
Add the milk and whisk until you have a smooth, lump-free batter. Leave it to one side until you're ready.
Preheat the oven to 200°C (392°F).
Pour 1 teaspoon of oil (or whatever you're using) into each hole of a 12-hole muffin tin.
Place the tin in the oven for 10 minutes so the oil gets nice and hot.
Carefully remove the tin and pour in the batter until each hole is about half full (be careful not to overfill).
Bake for 12–15 minutes — do not open the oven during baking or the puddings will deflate.
Serve immediately with your favourite roast or enjoy cold with something sweet.