Preheat oven to 375 degrees.
Grease a 12 cup muffin pan.
Streusel topping:
Stir together brown sugar, almonds, butter and cinnamon. Set aside. Whisk together flour, sugar, baking powder and salt. In separate bowl, whisk together egg, maple syrup, milk and butter; pour over dry ingredients. Evenly sprinkle with blueberries; stir just enough to moisten dry ingredients and distribute blueberries. Spoon into muffin cups, filling two-thirds full.
Sprinkle with streusel topping .
Bake for 20 to 25 minutes or until tops are firm to the touch. Let cool in pan on rack for 3 minutes.
Transfer to rack and let cool completely.
Adapted from Canadian Living Magazine.