Preheat the oven to 325 degrees F.
Cut the strawberries in half lengthwise, then cut a heart shape out of each half using the heart-shape cookie cutter.
Place mini paper liners in a mini muffin pan, then push a vanilla wafer cookie into the bottom of each liner.
Mix the cream cheese, sugar, and vanilla until well blended. Add the egg and sour cream; mix well. Top the cookies with the mixture using a small ice cream scoop.
Bake 18 to 20 minutes, then cool completely in the pan. Remove and refrigerate for at least 1 hour.
Top with a strawberry heart for a lovely finish.