Heat the oven to 350 degrees.
Separate 7 of the eggs into 2 separate mixing bowls. One bowl for yolks and one bowl for whites. The last egg (the entire egg meaning the yolk and white) will go into the yolk bowl.
Using an electric mixer on medium/high speed, mix the egg yolks and one whole egg until it looks frothy.
Gradually add the sugar to the egg yolks while mixing at medium/high speed.
Gradually add the potato starch and the almond extract to the egg yolks on medium/high speed.
In the other bowl, beat the egg whites and salt until stiff which means you have peaks that stand straight up.
Gently fold the egg yolk mixture into the egg white mixture. Do not overmix.
Add the batter to a 10-inch ungreased tube pan and bake for 45-55 minutes. You'll know the cake is done when you can insert a knife and it comes out clean, or when you gently push the cake and it springs back. It's very important that you don't grease the tube pan.
To retain the volume of the cake, cool it upside down. Many tube pans come with feet for this reason. If your tube pan doesn't have feet, you could invert the cake and insert the center portion into a bottle. If you choose not to invert your cake, it's still delicious but it may not hold perfect form.
Once the cake has cooled completely use a sharp knife to carefully cut around all of the edges to release the cake.
Once it's been removed from the tube pan pour the the cherry preserves on top and sprinkle with almond slices.