The perfect way to enjoy freshly cut watermelon when friends gather, this vibrant salad is given a boost with Nigella seeds, used in Indian and Middle Eastern cuisine. Nigella seeds and cardamom add a fragrance that complements watermelon, making it a welcome and refreshing savoury salad. Find nigella seeds at gourmet greengrocers and Indian spice stores.
Place sunflower seeds in a small frying pan over a medium heat. Cook for about 3 minutes or until toasted. Coarsely grind in a mortar and pestle, or chop. Transfer to a small bowl and then stir in cardamom, pistachios and nigella seeds.
Arrange watermelon cubes on a serving platter. Finely grate zest of limes over watermelon. Juice limes, then drizzle juice over watermelon. Sprinkle pistachio mixture over sparingly or liberally, as desired.
Transfer remaining pistachio mixture to a small bowl for guests to add more. Sprinkle over micro herbs and serve.