Preheat oven to 400 F. Grease muffin pan and set aside.
In medium bowl, whisk flour, baking powder, baking soda and salt. In separate large bowl, mix egg, maple syrup, vanilla, yogurt and applesauce.
Add dry ingredients to wet ingredients and stir until just combined. Do not overmix. Fold in strawberries and blueberries.
Pour batter into prepared muffin tin, filling cups about 3/4 full.
Bake 15 minutes, or until tops are golden brown and toothpick inserted in center comes out clean.
Remove from oven and let cool in muffin tin 5 minutes before removing.