Serves 4-6 ç
Preheat the oven to 200°C, 400°F, Gas 6.
Pour the water into a bowl, add the yeast and oil and mix until the yeast has dissolved. Put the bread mix into a separate bowl then add the water, yeast and oil mix. Add the onion and cheese and mix well with a wooden spoon or electric hand whisk for 1-2 minutes until well combined. Spoon into a well-greased, non-stick 450g/1lb loaf tin and spread evenly.
Leave to prove in a warm, draught-free place for 30-45 minutes until doubled in size. Bake in the centre of the preheated oven for 25-30 minutes then leave to cool until cold before removing from the tin.