8 egg whites, room temperature 1 ½ cup (300 grams) sugar ½ teaspoon cream of tartar ¼ teaspoon salt 6 sticks (1 1 /2 pounds) unsalted butter, cut into 1-tablespoon-size pieces and room temperature 1 vanilla bean, split and beans scraped 2 teaspoon vanilla 1 ½ cup fresh strawberries, halved
