Preheat oven to 325 degrees.
Combine the egg whites, salt and vanilla in a mixing bowl and using the wire attachment beat on medium speed until soft peaks form. This will take about 5 minutes.
Then add the cream of tartar and beat on high speed until glossy, stiff peaks begin to form. About another 4 minutes.
Remove the bowl from the stand mixer and using a spatula fold half of the sugar into the egg white mix. You want to do this slowly and fold in about 1/4 cup at a time.
In another bowl, whisk or sift together the other half of the sugar and the cake flour. The slowly fold this into the batter mix using a spatula.
Next, spoon into an un-greased Angel Food Cake tube pan and bake for 45 minutes.
When you remove the cake from the oven, immediately flip it over so that it cools inverted. Leave it like this for about 2 hours.
Make the whipped cream and strawberries during this time. For the whipped cream, mix all the ingredients together for about 7 minutes in the stand mixer or with a hand mixer. The cream should be stiff with nice fluffy peaks. Cover it and refrigerate it until you need it. Mix the strawberries and sugar together in a separate bowl, cover and refrigerate.
Use a knife to help loosen the cake from the sides of the pan to remove it.
When ready to serve, mix 1 cup of the strawberries and their juices into the whipped cream. Then top the cake. Add the additional strawberries on top of the whipped cream to serve.