Taste the strawberries to see how sweet they are — if they’re very sweet use 2 tablespoons honey and if they aren’t that sweet use up to 4 tablespoons. Combine strawberries, buttermilk, coconut milk, honey, rose water, and cardamom in the carafe of a blender and process until smooth. Add ice and process until broken up and smooth. Taste and add more honey or other flavoring as desired. Pour into glasses and serve topped with pistachios and a few slices of strawberries.