Preheat the oven
to 300°F/150°C/gas 2. Line a cookie sheet with
waxed paper.
Beat the egg whites and salt in a
large bowl with an electric mixer at medium speed
until frothy.
With mixer at high speed, gradually
beat in the superfine sugar, beating until stiff,
glossy peaks form.
Use a large rubber spatula to
fold in the coffee extract, pecans, and cornstarch. Fit a pastry bag with a
1/2-inch (1-cm) star tip.
Fill the pastry bag, twist the opening tightly
closed, and squeeze out 2-inch (5-cm) stars, spacing
2 inches (5-cm) apart on the prepared cookie sheet.
Bake for 80-90 minutes, or until the meringues are
crisp and lightly browned.
Cool the meringues
completely in the oven with the door ajar. Fill
with whipped cream just before serving.