Begin by preheating your oven to 325°F (160°C).
In a bowl, sift together the flour, 60g of sugar, cornstarch and salt. Set aside.
In a separate large bowl, use a mixer to beat the egg whites until foamy. Add the lemon juice, then continue beating until soft peaks form.
Gradually add the 100g of sugar, beating until stiff peaks form. Fold in the vanilla extract.
Gently fold the sifted flour mixture into the egg white mixture until just combined.
Spoon the batter into an ungreased angel food cake pan or a springform bundt pan. Use a knife to gently cut through the batter to remove any air pockets.
Bake for 35-45 minutes, or until the cake is golden brown and springs back when lightly touched.
Remove the cake from the oven and invert the pan onto a cooling rack. If using a springform bundt pan, invert the pan onto a funnel or a bottle to keep space between the pan and the cooling rack. Allow the cake to cool completely in the pan before removing.
Prepare the strawberries. In a medium bowl, combine the sliced strawberries, lemon juice and sugar. Let the strawberries macerate for at least 30 minutes to release their juices.
Make the whipped cream. In a large bowl, beat the heavy cream and sugar until stiff peaks form.
Assembly: once the angel food cake has cooled, use a serrated knife to carefully slice it horizontally into two layers.
Place one layer of cake on a serving platter and top with a generous spoonful of macerated strawberries.
Add a layer of whipped cream over the strawberries, then place another layer of cake on top.
Garnish the top of the cake with additional strawberries and a dollop of whipped cream.