Freezing: You can easily freeze these in advance so you can have them to hand for any occasion. Place your shaped raw burgers onto a tray lined with silicone, lay another sheet of silicone on top and wrap with cling film. Allow to freeze before placing into a labeled zip lock bag.
The raw patties will sit happily in your fridge for up to 24 hours. You can take out and cook straight from fridge.
The mango raita can be fully prepared and left in you fridge for a day or two just give it a little stir before serving.