In a bowl sieve in the flour, baking soda and baking powder

Add in the sugar and mix

Add the margarine and whisk till it forms crumbs

Add the eggs one by one as you whisk. Then the vanilla essence

Add in the lemon rind. Then fold in while adding the lemon juice to form batter

Pour in a loaf tin or 8" tin and place in a preheated oven. Bake for 40 - 45 mins at 150°c.

It is ready when a knife inserted in comes out clean.