Preheat your oven to 350°F (175°C). Do not grease the tube pan.
In a medium bowl, sift together the flour and half of the sugar (¾ cup or 75 g). Set aside.
In a large mixing bowl, beat the egg whites with an electric mixer at medium speed until foamy.
Add the cream of tartar and continue to beat until soft peaks form.
Gradually add the remaining sugar (¾ cup or 75 g), one tablespoon at a time, while beating on high speed until stiff, glossy peaks form.
Gently fold in the vanilla, almond extract, and salt using a rubber spatula.
Slowly fold in the flour and sugar mixture, about one-third at a time, being careful not to deflate the egg whites.
Once fully combined, pour the batter into the ungreased tube pan.
Bake in the preheated oven for 25-30 minutes or until the cake is golden and springs back when lightly pressed.
Remove from the oven and immediately invert the pan onto a cooling rack. Let the cake cool completely in the pan upside down.
Once cooled, use a knife to gently loosen the edges and remove the cake from the pan.
Serve slices topped with fresh berries and whipped cream if desired.