1 Pre-heat the oven to 170°C/325°F/Gas Mark 3. Prepare 2 baking sheets and line with baking parchment.
2 Sift the icing sugar and ground almonds together then place them in a food processor on full power until a fine powder has formed.
3 Whisk the egg whites, sugar and food colouring until you have a firm and shiny meringue.
4 Using a large metal spoon gently fold in thirds the icing sugar and almond mixture. Do not over mix - when the spoon is pulled through the mixture it should flow back together.
5 Using a piping bag fitted with a 1cm (1⁄2 inch) round nozzle, carefully pipe circles onto the baking tray ensuring adequate spaces between each macaroon. If a peak forms use a wet finger to smooth down.
6 Tape the tray down to release any air bubbles and leave to dry for 15 minutes. Bake for approximately 10 minutes until the macaroons have frilly feet and easily peel away from the baking sheet. Allow to cool completely on a wire rack.
7 Meanwhile prepare the filling - mix together the yogurt and mascarpone and whisk until smooth and well combined.
8 Sandwich the macaroons with a small blob of blueberry jam and a teaspoon of yogurt and mascarpone mixture. Gently press together. Repeat until you have 8 pairs of macaroons.
Recipe courtesy of Rachel's Best of British recipes