Pre-heat your oven to 160C Fan/400F/Gas Mark 6, line a swiss roll tin or a baking tray with a lip, with baking paper. The one I used was a Wilton tray that is 33.7 x 23.5 cm (13.25 x 9.25 inches)
For the sponge, whisk the eggs, vanilla extract and sugar together with an electric whisk or in a food mixer for 8 minutes until it reaches 'ribbon stage' - this is when you can drizzle the mixture in a figure 8 and it takes at least 3 seconds to sink back in
Gently fold in the plain flour with a spatula or large spoon, go slowly to not to lose the volume
Pour the mixture into the tin, and spread the mixture out into an even layer using a palette knife. Bake for 12 minutes
Remove from the oven and tip onto a clean sheet of baking paper sprinkled with caster sugar
Remove the baking paper the sponge was baked with, then roll up the sponge, taking the clean baking paper with it, then leave to cool completely
Whip up the double cream for the filling with the icing sugar and vanilla extract
Gently unroll the sponge and spread the jam all over it, then a thin layer of the whipped cream, saving some for topping the swiss roll
Re-roll the sponge and place onto a serving plate. Cut the ends for a neater appearance
Pipe the extra whipped cream on top, add fresh strawberries and sprinkle over some freeze dried strawberries
Serve immediately, store any leftovers in the fridge for up to 2 days
Notes
Make sure your ingredients are at room temperature before you start baking, particularly the eggs.
You need to roll up the swiss roll when it is hot from the oven. If it is too cold, it won't roll as neatly and could crack.
I used strawberry jam, but you can use any jam you prefer.
Although I provide cup measurements, I highly recommend weighing your ingredients out using digital kitchen scales. It is the most accurate way to measure ingredients and will ensure the best results. Digital scales are very low cost and can be purchased for around £12 ($16.50).
For teaspoon (tsp) and tablespoon (tbsp) measurements, please use measuring spoons and not the type of spoons you eat with. Again this will ensure accuracy and provide the best results.