The easiest way will be to use an ingredient from the same food group. For example, you may use turkey or pork instead of chicken in your salad (same amount).
Use any type of whole wheat pasta or brown rice instead of wheat crackers and crushed saltine crackers instead of croûtons. For the amounts you can pretty much use the same amount or look up the food in the alli nutrition logs or a nutrient analysis website such as www.calorieKing.com until you get to know the portion size pretty good. Hope this helps.
Let me know if you have any further questions,
Sylvia Melendez-Klinger, MS, RD, LDN, CPT - registered dietitian