Mom's Citrus Bran Loaf

Ingredients

• 1 egg
• 1 cup whole milk
• 1/2 cup unsalted butter, melted
• 1 tbsp orange zest
• 1 tbsp lemon zest
• 1 cup plain all bran cereal
• 1 + 1/2 cup all purpose flour
• 1/2 + 1/3 cup granulated sugar, separated
• 1 tbsp baking powder
• 1/2 tsp salt
• 1 tbsp orange juice
• 1 tbsp lemon juice