Preheat the oven to 325℉/163℃.
Separate the eggs immediately after removing them from the fridge to prevent egg yolks from breaking and getting in the egg whites.
Place egg whites in a large bowl or stand mixer bowl; let it sit at room temperature for about 30 minutes. Add cream of tartar.
Add sugar and salt to a food processor and grind until it turns into powder.
Reserve ¾ cup powdered sugar and add the rest to the flour. Whisk flour. Set aside.
Start beating the egg whites with an electric mixer at medium-low speed until frothy, about 1 minute.
Increase speed to medium-high and slowly add the reserved sugar (about 2-3 tablespoons at a time), making sure sugar is thoroughly mixed.
Keep beating until soft peaks form, about 6-7 minutes. Do not overbeat. Add vanilla, lemon juice, and almond extract and mix until incorporated.
Switch to a rubber spatula and start incorporating the flour mixture into the egg white mixture in 3-4 additions, folding gently with each addition until incorporated.
Scrape the mixture into a 12-cup ungreased tube pan.
Bake until a toothpick inserted into the center comes out clean, about 40-45 minutes. Start checking after 40 minutes. It is okay to have some cracks.
Let the cake cool on a cooling rack for about 1-2 hours before removing it from the pan.
To remove the cake, unmold and run a knife around the edge inside the pan. Place it on a platter, and serve it with lemon curd and fresh fruit.