Cheese & caramelised onion coburg

INGREDIENTS

• 400g malted grain brown bread flour , or wholemeal or granary bread flour
• 100g strong white bread flour
• 7g sachet easy-bake dried yeast (or 2 tsp Quick dried yeast)
• 1½ tsp salt
• 1 tbsp soft butter
• 1 large onion , cut into thin wedges
• 1 tbsp olive oil
• 1 beaten egg
• 50g grated mature cheddar