Strawberry-Basil Shortcakes

Name: Strawberry-Basil Shortcakes
Cuisine: European, British
Ingredients: 1/4 cup sugar; 1 tablespoon baking powder; 1/2 teaspoons kosher salt; 2 cups all-purpose flour, plus more for surface; 6 tablespoons (3/4 stick) chilled unsalted butter, cut into pieces; 1 cup heavy cream; 1 large egg, beaten to blend; 1 1/2 pounds fresh strawberries, hulled, quartered (about 3 cups), divided; 4 tablespoons sugar, divided; 2 sprigs basil; 2 cups heavy cream; 2 tablespoons crème fraîche