Strawberry-Rhubarb Tartlets

Ingredients

• 2 ½ cups all-purpose flour
• ¼ cup granulated sugar
• ¼ teaspoon table salt
• ¼ teaspoon baking powder
• 1 cup cold butter. cut into small pieces
• 2 large egg yolks
• ½ cup ice-cold water
• 3 tablespoons butter
• ½ cup sliced fresh or frozen rhubarb
• 1 cup sliced fresh strawberries
• ⅔ cup granulated sugar
• 1 tablespoon all-purpose flour
• 3 tablespoons fresh lemon juice. divided
• Parchment paper
• 1 large egg
• 2 ½ tablespoons milk. divided
• 1 ½ cups powdered sugar

Instructions

1. Pulse first 4 ingredients in a food processor until blended. Add cold butter. and pulse 5 or 6 times or just until mixture resembles coarse meal. Stir together egg yolks and ice-cold water. With processor running. pour yolk mixture through food chute. and process just until mixture forms a ball and pulls away from sides of bowl. Wrap dough in plastic wrap; chill 1 hour.
2. Meanwhile. melt 3 Tbsp. butter in a 1-qt. saucepan over medium heat. Add rhubarb. and sauté 3 minutes. Stir in strawberries and 2/3 cup granulated sugar; cook. stirring constantly and crushing fruit with spoon. 5 minutes.
3. Stir together 1 Tbsp. flour and 2 Tbsp. lemon juice until smooth. Stir juice mixture into rhubarb mixture; bring to a boil. Cook. stirring often. 2 minutes or until thick. Remove from heat. and transfer mixture to a small bowl. Cover and chill 30 minutes.
4. Preheat oven to 350°. Unwrap dough; roll to 1/8-inch thickness on a floured surface. Cut dough into 48 rectangles. using a 2 1/2- x 3-inch cutter and rerolling scraps. Place half of dough rectangles 2 inches apart on parchment paper-lined baking sheets. Top each rectangle with about 1 Tbsp. strawberry mixture. Dampen edges of dough with water. and top with remaining dough rectangles. pressing edges to seal.
5. Stir together egg and 2 Tbsp. milk. and brush over tops of tarts. Cut a small “X” in top of each tartlet for steam to escape.
6. Bake tartlets at 350° for 30 to 35 minutes or until golden. Transfer tartlets to a wire rack; cool 15 minutes. Whisk together powdered sugar and remaining 1 Tbsp. lemon juice and 1 1/2 tsp. milk; drizzle over tartlets.