Add strawberries, sugar and water to a medium saucepan. Bring to a boil over medium-low heat. Once it reaches a boil, reduce heat and allow to simmer for 10 minutes until thickened. Remove from heat, stir in vanilla extract and allow to cool.
Meanwhile, prepare pie crust according to recipe instructions. Roll pie crust to 1/8-inch thickness and cut with a 2-inch round cutter. Pull any scraps back together and reroll and cut until you have 12 circles. Arrange onto a rimmed baking sheet lined with a silicon baking mat or parchment paper. Cover with a damp cloth while the strawberries cool.
Once strawberries have cooled, spoon about 2 tablespoons of filling into the center of half of the circles of pie crust. Top with another circle of pie dough and seal edges with a fork. Cut three slits with a sharp knife into the top of the pie crust to allow steam to escape while baking.
Wrap well with plastic wrap and place into freezer for 15 minutes or until ready to bake.
Preheat oven to 400ยบ F.
Remove plastic wrap from baking sheet, brush tops of each pie with melted butter and sprinkle with sugar. Place baking sheet into preheated oven. Bake until golden brown and bubbling, about 25 to 30 minutes. Remove from oven and allow to cool about 10 minutes before serving.