To change ingredients in a meal, start by assessing the nutritional benefits and potential flavor profile of the new ingredient you want to introduce. Consider if the new ingredient will complement the other flavors in the dish and if it will contribute to the overall balance of macronutrients. Swap out similar ingredients where possible to maintain the structure of the dish, and adjust cooking times or methods as needed to accommodate the new ingredient. Remember to consider any allergens or dietary restrictions that may be present for yourself or others consuming the meal. And most importantly, don't be afraid to experiment and have fun with creating new and delicious dishes!