Offering to the Spiritual Guide is a special Guru yoga of Je Tsongkhapa in conjunction with Highest Yoga Tantra. It was compiled by the first Panchen Lama, Losang Chökyi Gyaltsän, as a preliminary practice for Vajrayana Mahamudra. The main practice is relying upon the Spiritual Guide, but it also includes all the essential practices of the stages of the path (Lamrim) and training the mind (Lojong), as well as both the generation stage and completion stage of Highest Yoga Tantra.
This practice includes a tsog offering so you can bring a vegetarian food or beverage, packaged or prepared, as an offering if you wish. Fruits, vegetables, cookies, crackers, dips, and bottled beverages include some examples of common tsog offering items.