The average Australian diet generates around 1.4 tonnes carbon per person per year. That's because we eat a lot of meat.
The Australian Dietary Guidelines say we should eat no more than 455 grams meat each week, but most of us eat four times that amount. It's great to go vegan or vegetarian, but simply cutting your meat consumption to the Dietary Guideline limits will also slash your footprint.
My family do this by eating plant-based meals during the week and a meat-and-veggie meal on Fridays and Saturdays. But you might prefer to eat very small portions of meat more often, perhaps in a stir-fry, curry or salad.
Data and references in the 'Notes' section.