Heat a dry pan and add the raspberries, reserving a few pieces.
Cook the raspberries until they start to soften, then use a fork to crush each piece slightly and cook for 5-7 more minutes. Set aside to cool completely.
Beat the cream cheese with the Erythritol until well combined. Add the raspberries and continue to mix. Finally, fold in the coconut.
Cover and refrigerate until firm, for about an hour.
Line a tray with baking paper.
Cut the reserved raspberries into halves or quarters, depending on their size.
Scoop tablespoonfuls of the cold cheesecake mixture and press a piece of raspberry half or quarter into the center. Roll into a ball and place them on the lined tray. Repeat with the remaining mixture and fruit until you run out of the mixture.
Place the chopped walnuts on a plate. Roll the cheesecake balls in, pressing lightly to coat evenly.
Serve cold or store in the fridge in an airtight container for up to 2 days.