In a large bowl, combine the pancake mix and milk until smooth.
Make sure there are no lumps for an even texture.
Crack the egg into the mixture.
Add sugar and vanilla extract.
Mix thoroughly.
Heat a non-stick pan on medium heat.
Grease lightly with butter or cooking spray.
Ladle 1/4 cup of batter onto the hot pan for each pancake.
Sprinkle banana slices onto the batter.
Cook until bubbles form on the surface, then flip.
Cook on the other side until golden brown.
Repeat with remaining batter.
Serve pancakes warm, topped with strawberry slices.