Lemon and orange drizzle cake

As mentioned many times, when I'm stressed, I bake to let off steam.
Today I had to deal with the clinic, which has lost my prescription request, submitted 12 days ago. It's for my son's meds, which is available only on prescription, otherwise I wouldn't have bothered with them.
It's not the first time they did it, and as our supply at home is running very low, I'm upset about their cavalier approach.
I was fuming after an exchange of phone calls, and went to the kitchen to bake. I baked a passion fruit drizzle cake last week, and decided I'd make another drizzle cake, this time a more traditional one, with citrus fruit.
You can make it with either lemons or oranges, or a mix of both.
Gorgeously moist, this cake is a lovely dessert for any tea party.

Lemon and orange drizzle cake
Ingredients:
zest of 1 lemon
zest of 1 orange
180g caster sugar
juice of 1/2 lemon and 1/2 orange
3 medium eggs
20g polenta (optional)
200g self-raising flour
1tsp baking powder
2tbsp orange gin (optional)
120g butter, melted
for the icing:
5 heaped tbsp icing sugar mixed with orange juice

In a medium sized bowl zest a lemon and an orange. Add the caster sugar and juice of half a lemon and half an orange, mix together. Beat in the eggs, one at a time, then add polenta and sift in the flour. Add a teaspoon of baking powder, orange gin and melted (but not hot) butter. Mix well.

Oil a cake tin and pour in the cake batter. Place the cake tin in the oven preheated to 180C. Bake for 50+ minutes. Check with a wooden toothpick if it's ready, once it comes clean, the cake is baked.

Let the cake cool a bit before taking it out of the tin.
Mix the icing sugar with enough freshly squeezed orange juice to make a runny icing, and drizzle over the cake.
Decorate with jelly diamonds or any other sweets.

The polenta is optional in this recipe, it just adds a nice texture. The gin is also optional, it adds a more concentrated flavour.
I have a bottle of Tanqueray orange gin which I got as a present for my birthday back in February, but I rarely have a gin and tonic, and the bottle is almost full. If you don't have the orange gin, a limoncello could be a nice substitute. Or skip the alcohol altogether. You can't actually taste the alcohol, as it evaporates during the baking, yet it gives a more intense flavour.