Blueberry Oat Muffins (Lunchbox friendly)

• 3 cup plain rolled oats 
• 1 tsp cinnamon
• 2 tsp baking powder 
• .5 tsp salt
• 1 cup mashed banana (2-3 bananas depending on their size) 
• 3 tbsp maple syrup 
• 2 eggs
• 1.5 cup milk (or any milk you prefer)
• .5 tsp vanilla essence
• 1 punnet blueberries