Meringue:Prepare glass or stainless steal mixing bowl and whisk by wiping with distilled white vinegar or lemon juice to ensure no residual grease remains. lemon juice or vinegar
Preheat oven to 250°F.
Draw 8" circle on piece of parchment using a cake round or plate as a guide. Turn parchment over and place on baking sheet.
Place egg whites and cream of tartar in mixing bowl. Whisk on medium speed until soft peaks form.
6 large egg whites, room temperature, 3/4 teaspoon cream of tartar
Add sugar, one tablespoon at a time, to mixer while still on medium speed. Allow sugar to fully incorporate before adding the next spoonful.
380 g superfine sugar
Continue whisking until firm peaks form. Add vanilla and whisk until combined. The meringue should form a sturdy "hook" on the whisk when removed from bowl.
1 1/2 teaspoons vanilla extract
Sift cornstarch and salt over meringue. Fold to combine using rubber spatula.
2 teaspoons cornstarch, 1/2 teaspoon salt
Transfer meringue to prepared parchment paper. Using the template as a guide, smooth sides and create a slight dip in the center to hold toppings. Note: the meringue will cooks as it looks - pipe, swirl or smooth for desired appearance.
Bake for 1 hour. Reduce heat to 200° and back for another 1.5 hours. The outside should be hard and crunchy, the inside should be dried but still springy (like a marshmallow).
Resist the temptation to open the oven while baking. While some cracks will occur naturally, the fewer drastic temperature changes will limit the cracks.
Turn oven off, leaving the baking tray inside. Set the door slightly ajar with a wooden handle until the meringue is cool - about 1 hour.
Peanut Butter Whipped Cream:Place heavy cream, peanut butter and confectioners' sugar in a chilled mixing bowl. 1 cup heavy whipping cream, 1 tablespoon creamy peanut butter, 2 tablespoons confectioners' sugar
Whip until soft peaks form.
Strawberry Topping:Combine all ingredients in small saucepan. 1 pound fresh or frozen strawberries, 1/4 pound granulated sugar, 2 teaspoons lemon juice, cornstarch slurry
Heat over medium. Simmer for 5 minutes stirring occasionally.
Cool completely before use.
Garnish with fresh strawberries and chopped peanuts if desired.