Homemade Strawberry Pop Tarts

Name: Homemade Strawberry Pop Tarts
Prep time: 1 h
Cook time: 25 min
Total time: 1 h 25 min
Cuisine: American
Ingredients: 2 cups quartered (stems-removed strawberries); 1/2 cup sugar; 2 tsp cornstarch; 2 tsp lemon juice; 1/4 tsp vanilla extract (optional); 2 cups all-purpose flour; 1 Tbsp sugar; 1/2 tsp salt; 13 Tbsp unsalted sweet cream butter (cold and cut into pieces (about 1 Tbsp-sized pieces)); 1/2 cup sour cream; 1 egg (lightly beaten); 2 tsp water; 1 cup powdered sugar; 3-4 Tbsp heavy cream; 1/2 tsp vanilla extract; Sprinkles (if desired)