Preheat the oven to 180°C regular bake & line a small to medium loaf tin with baking paper
Add the flour, baking powder (if using), sugar, and salt to a large mixing bowl and stir to combine
Pour in beer or soda, stir again to combine into a sticky dough
Scrape into the prepared loaf tin and smooth out
Sprinkle with toppings and drizzle with olive oil
Bake for 40 mins - it will rise and puff up, going a golden brown
Slice once cool