For the best texture, keep the grilled chicken, chopped romaine, and dressing stored separately in airtight containers and assemble the salad just before serving. The chicken will keep for up to 4 days in the refrigerator and can be served cold or gently reheated in a skillet. The dressing thickens as it chills, so whisk in a splash of water or lemon juice to loosen it if needed before tossing with the lettuce. To keep carbs low, avoid store bought dressings with added sugar and skip traditional croutons in favor of Parmesan crisps or extra bacon for crunch. This salad works well for meal prep lunches if you portion the components into individual containers and add the dressing right before eating.