When making these I whipped the meringue and used icing sugar instead of plain sugar.
I ground the almonds fresh that morning in my vita-mix and sifted them twice.
Then I sifted the almond and icing sugar together before mixing in the whipped meringue.
Once combined i piped the contents onto a cookie sheet. Slammed the pan against the counter about 4 times to remove air bubbles, let them sit 1 hour until the top was firm then baked for 10 minutes on 280F
Use your favorite icing. I used creamcheese and powdered sugar with a hint of vanilla.
I hope you give these a try.