Makes about 2 dozen Ingredients 215 grams (7½ ounces) confectioners’ sugar 100 grams (3½ ounces) egg whites (about 3 large) at room temperature 140 grams (5 ounces) almond flour or sliced almonds 25 grams (2 tablespoons) castor or superfine granulated sugar Pinch salt Green food coloring (preferably paste) 2 teaspoons very finely grated key lime…