I think you can eat Taco Bell 3x a week but limit the amount you eat.

Many of their combo meals can easily be over 800 calories in a single meal. I like to strive for three 500 calorie meals, and 500 calories of snacks in a day, so I avoid the combo meals and sodas. Limit myself to just a crunchwrap, or just a taco and bean burrito. The first week or so, it may feel unfilling but your body will adjust if you can tough it out for a while.