Gluten-free pizza - Good Food Middle East

Ingredients

• 400g gluten-free bread flour
• 2 heaped tsp golden caster sugar
• 2 tsp gluten-free baking powder
• 1 tsp fine salt
• 1 heaped tsp xanthan gum
• 5 tbsp olive oil
• 2 tbsp olive oil
• 1 small onion, finely chopped
• 1 x 400g can chopped tomatoes
• 2 tbsp tomato purée
• 1 tsp caster sugar
• ½ small bunch basil, leaves shredded
• 2 x 125g balls buffalo mozzarella