From Tevalai (Indian Temple) of Lampang , Chiang Mai

Ganesha Worshiping
The process of worshiping Lord Ganesha
1. Light a candle or oil lamp, incense, incense, etc. in front of an idol or a picture of Ganesha.
2. Offer sacrifices to worship. You can place milk, fruit, and drinking water in front of Ganesha and pray.
3. Recite the universal katha and the kat ha of Lord Ganesha followed by your wishes

Ganesha needs to have its place of worship and not be mixed with other amulets / Buddha images or monks.

The Katha to worship Lord Ganesha is “Om Sri Ganesha na Maha”. Then say a prayer for yourself.