In a blender, combine the almond milk, half the chopped almonds, half the dates and the banana. Add the ice and a pinch of salt and blend on high until smooth. Add the remaining almonds and dates, and the date syrup, if using, and pulse until the fruit and almonds are broken up into small pieces. Divide the smoothie between 2 chilled glasses and drizzle the tops with more date syrup, if you like. Serve with a spoon.