Preheat your oven to 300°F (150°C). Line a baking sheet with parchment paper.
In a mixing bowl, sift together almond flour and powdered sugar. Set aside.
In another bowl, beat egg whites until foamy. Gradually add granulated sugar, vanilla extract, and salt. Beat until stiff peaks form.
Gently fold the almond flour mixture into the egg whites until well combined.
Transfer the batter to a piping bag and pipe small circles onto the prepared baking sheet.
Let the piped batter sit at room temperature for 30 minutes to form a skin.
Bake in the preheated oven for 15 minutes. Let cool completely before removing from the baking sheet.
For the filling, combine raspberries, sugar, and lemon juice in a saucepan. Cook over medium heat until thickened. Let cool.
Pipe the raspberry filling onto one macaron shell and sandwich with another shell. Repeat with remaining macarons.