10 ounces frozen whole strawberries (2 cups)
3/4 cup whole milk, room temperature
6 large egg whites, room temperature
2 teaspoons vanilla extract
2 1/4 cups (9 ounces) cake flour
1 3/4 cups (12 1/4 ounces) granulated sugar
4 teaspoons baking powder
1 teaspoon salt
12 tablespoons unsalted butter, cut into 12 pieces and softened
10 tablespoons unsalted butter, softened
2 1/4 cups (9 ounces) confectioners' sugar
12 ounces cream cheese, cut into 12 pieces and softened
  Pinch salt
8 ounces fresh strawberries, hulled and sliced thin (about 1 1/2 cups)