1.Combine the sugar, almond meal flour, and salt in the bowl of a food processor; pulse until finely ground. Add the butter, and mix again until well blended. Add in the eggs one by one, and process on high speed until creamy and fluffy.
Preheat the oven to 350∞F. Line a baking sheet with parchment paper.
Slice each croissant horizontally sandwich-style. Spread roughly 2 tablespoons of filling on the bottom of the croissant. Replace the top and spread approximately 1 tablespoon of filling evenly over the top. Sprinkle with sliced almonds.
Arrange the croissants on the baking sheet . Bake for 15 to 18 minutes until golden brown. Cool completely and sprinkle with powdered sugar.