Mark Needham is back with another StarTree Recipe, this time about using JSON indexes in Apache Pinot. He first demonstrates how to ingest semi-structured data Apache Kafka using the kcat command line tool, before showing how to configure Apache Pinot to ingest the data from Kafka. He further illustrates querying the Pinot table, using the JSON match function and details handling of arrays, nested data, and exclusion of fields. The tutorial underscores the improved efficiency and flexibility of using JSON indexes introduced in Pinot 0.12.