100% whole wheat or 100% whole grain tortillas (no exceptions)
olive oil
any seasoning of your choice (basil, seasoning salt, etc.)
Put some olive oil in the frying pan and add the sliced peppers. If your chicken is frozen, you may put it on at the same time.
Cook it on medium so you don't get any burned pieces of food. Add a little bit of seasoning, but make sure you don't put on too much since we're trying to keep this a low-sodium meal.
When the chicken is tender and the peppers are cooked, pour everything onto a separate plate. Test it out to see if it needs more seasoning. Once again, be careful not to overdo it with sodium.
At this point, the bottom of the pan should still be greasy from the olive oil. Go ahead and put a couple tortillas onto the frying pan on top of each other to heat them up. Flip them around a little. You can make them crispy but be sure there are no burn marks.
Final step - Put the chicken and bell peppers onto the tortilla and now you've got your fajitas.
Important: If you add anything else, like sour cream or cheese, you're potentially sabotaging the recipe by adding more calories than intended.