If you are looking for a way to fight Gluttony, try to think about Jesus and His disciples. Do you remember which food is the most deeply linked to Jesus? Bread (and fish), of course.
Bread is such a simple meal, very easy to prepare and made with essential ingredients that almost everyone can find in nature. Bread is also the symbol of humility and austerity and, for this reason, it is opposed to the sin of Gluttony. Sometimes there is no need to treat ourselves with some special tasty food. Think about the poorest people on earth, who can barely get fed every day. Think about how lucky you are for all the different types of food you can have, compared to the poor. Thinking of the less fortunate and depriving oneself of delicacies is also an act of generosity and altruism.