Rhubarb Custard Tartlets (Mini Tarts)

Name: Rhubarb Custard Tartlets (Mini Tarts)
Prep time: 30 min
Cook time: 1 h
Total time: 1 h 30 min
Cuisine: British
Ingredients: 1 1/2 cups all purpose flour (190 grams*); 1/2 cup powdered sugar (60 grams); 1/4 teaspoon salt; 1 stick cold butter, cut into cubes (113 grams); 1 large egg; 1/2 teaspoon pure vanilla extract; 1 cup heavy cream (240 milliliters); 1 small vanilla bean (cut in half, split open and scrape out the seeds); 1/2 teaspoon ground ginger (optional); 3 egg yolks; 1/2 cup granulated sugar (100 grams); 2 large rhubarb stalks (250 grams); 1/2 cup water (125 milliliters)