In a large mixing bowl, cream together the softened butter and granulated sugar until light and fluffy, about 2-3 minutes.

Incorporate the egg and vanilla extract into the creamed mixture, beating until smooth and glossy.

In a separate bowl, whisk together the flour, baking soda, and salt. Gradually stir into the wet ingredients until just combined.

Gently fold in the diced strawberries.

Drop generous amounts of dough onto a prepared baking sheet, spacing them about 2 inches apart.

Preheat your oven to 350°F (175°C) and bake the cookies for 10-12 minutes.

Allow the cookies to cool on the baking sheet for about 5 minutes before transferring to a wire rack.