Crusty White Sandwich Loaf - Gluten-Free Heaven

Ingredients

• 475 ml warm water
• 10 g active dried yeast (ensure gluten-free)
• 25 g caster sugar
• 180 g gluten-free rice flour
• 190 g gluten-free plain (all-purpose) flour (plus extra for dusting)
• 2 tsp xanthan gum
• 25 g psyllium husk powder (ensure gluten-free)
• 6 g salt
• 2 tsp cider vinegar
• 2 large egg whites
• butter or oil (for greasing)