Bonam is actually a cooked rice with Jaggery and milk well prepared in a different brass, earthen pot decorated with neem leaves, turmeric and vermilion (Kumkum). A lamp is lit along with the pot and is referred to as Bonam Jyoti. Though main Hindu temples are proposed at sangams (confluence https://hanumanmandiradelaide.com.au/how-to-do-pooja-on-hanuman-jayanti-a-step-by-step-guide-for-a-meaningful-celebration/