Whisk together the dry ingredients. (flour, baking powder, sugar, and salt)
Melt the butter. I do this in a microwave-proof jug, that's large enough to hold all the wet ingredients, which means fewer dishes!
Whisk together the wet ingredients (melted butter, egg, vanilla, milk)
Add the wet ingredients to the dry ingredients, whisk them until well combined. There may be a few lumps, don't worry about these.
Leave the batter to rest for 10 mins.
While the batter is resting, dice the strawberries into 1cm cubes. (make sure you remove the leaves lol.)
Fold the diced strawberries into the pancake batter.