Instructions: Sift almond flour and powdered sugar together into a mixing bowl. In a separate bowl, beat egg whites until frothy. Add cream of tartar and continue beating. Gradually add granulated sugar while beating until stiff, glossy peaks form. Add food coloring if desired. Gently fold the almond flour mixture into the egg whites until well combined. Be careful not to overmix. Transfer the batter into a piping bag with a round tip. Pipe small circles onto a baking sheet lined with parchment paper. Tap the baking sheet on the counter to remove air bubbles and let the macarons sit for about 30 minutes to form a skin. Preheat your oven to 300F 150C. Bake the macarons for 15-18 minutes or until they easily lift off the parchment paper. Remove from the oven and let cool completely on the baking sheet. Once cooled, spread raspberry curd on the flat side of one macaron and sandwich it with another. Repeat with the remaining macarons and curd. Enjoy your delicious Raspberry Macarons!