Coffee and Walnut Baked Oats

Ingredients

• 2 ripe bananas
• 2 cups oats
• 1 cup plain flour
• 1/2 cup protein powder
• 1/4 tsp bicarbonate of soda
• 1 tsp baking powder
• 1/3 cup maple syrup
• 1 double espresso
• 250 ml oat milk
• 60 g California walnuts
• 1/3 cup instant coffee powder
• 1/3 cup caster sugar
• 1/3 cup cold water
• 500 g plain yogurt