I am lazy so would do a normal Victoria sponge with non-dairy marg
Or there's Nigella's Party Cake:
Whisk 6 egg yolks with 200g caster sugar till creamy, fold in 200g ground almonds and the zest of a lemon.
Whisk 6 egg whites in a anotehr bowl, beat a spoonful of white into the yolks and then fold the rest in gently.
Pour into a 1.5l tin (she uses a brioche tin but I don't have one so use a ring mould thing) and bake 1hr 160 C