Preheat oven to 400 degrees Fahrenheit.
Mix blueberries, cinnamon, corn starch and maple syrup in a medium sized bowl.
Pour into a well greased pan.
In another bowl mix together the flour, oats, brown sugar and butter until it feels like dough.
Sprinkle mixture overtop of blueberries.
Bake at 400 degrees Fahrenheit for 25-30mins
Yummy blueberry crisp :)