Protein French Toast Muffins

• 9 slicesbread — higher-fiber preferred
• 2large whole eggs
• ½ cupegg whites
• ¾ cupmilk
• 1 tbspmaple syrup
• 1 tspvanilla extract
• ¼ cupvanilla protein powder
• 1 tspcinnamon
• ¼ tspnutmeg
• ¼ tspsalt
• —icing sugar — optional

Protein 'icing'

• ¾ cupplain Greek yogurt
• 1 tbspmaple syrup
• —milk — as needed