I have attempted this before and it isn't as easy as it seems! This is my 2nd attempt. It is not very good but somewhat better than my first round where I couldn't even roll my cake!
90g self raising flour (sifted)
3 eggs lightly beaten
115g caster sugar
160g jam (I use nutella)
icing sugar to sprinkle
1. Preheat oven to 190deg C
2. Lightly grease a shallow 2 x 25cm x 30cm tray and line with baking paper extending over the 2 long sides
3. Sift flour three times onto baking paper
4. Beat eggs using electric beater till pale. Add 115g sugar gradually beating constantly till mixture is pale and glossy. Transfer into large bowl and use metal spoon to fold in the flour quickly and lightly
5. Spread onto the tin and smooth the surface. Bake for 10-12 min till golden brown
6. Place a clean tea towel on a work surface and lay another sheet of baking paper over
7. using tea towel as a guide, carefully roll cake up from the short side rolling the paper inside the roll. Put rolled cake onto a wire rack for 5min then unroll and allow cake to cool
8. Spread with nutella and re-roll. Trim sides with knife and sprinkle icing sugar on top
9. Cut and serve
(Adapted from: Baking - A Commonsense Guide)