In a large mixing bowl, combine the flour, baking powder, baking soda, sugar and salt.
In another bowl, whisk to combine the milk, egg and vanilla. Quickly incorporate the liquid mixture into the flour just until combined. Fold in the sliced banana and strawberries.
Place a large skillet over medium heat or a griddle pan preheated to medium-heat (about 325°F) and paint a very thin oil. Ladle ¼ cup of the batter into the pan and cook undisturbed until bubbles appear on the surface and the bottom is golden brown, about 2 minutes. Flip and continue cooking the second side for a minute or until nicely browned. Transfer to a warm plate and continue cooking the rest. Serve immediately with your favourite syrup a soft butter.