Line 12 regular-size muffin tins with paper liners.
In a large bowl mix together sifted flour, baking powder, sugar and salt until well combined.
Add in the sliced strawberries to the flour mixture and mix to combine with a wooden spoon.
In another small bowl whisk together the half and half, egg, strawberry extract and melted shortening (the melted shortening added to the cold cream will seem like it is curdled, don't worry this will make a light textured muffin, just mix well with the cream).
Add the cream mixture to the dry mixture; mix JUST until moistened (do not overmix!).
Using an ice cream scoop, divide the batter evenly between 12 muffin tins.