When attending a Tsog, each practitioner must bring an offering to be included on the shrine. Remember that the food we bring is an offering for the Buddhas and Bodhisattva, not for us! Therefore, it is not like a pot-luck. You should select the finest quality foods – as if you were expecting a very important guest – and not necessarily food that you like. When you go to the store to purchase Tsog food, be free from a mind of partiality and be sure you are buying (or making) the offerings with a pure motivation (not thinking about how much money you are spending!).