To change ingredients in a meal, start by identifying the key components of the recipe and their roles in the dish. Consider the flavors, textures, and nutritional content that each ingredient contributes. Then, choose substitutes that align with your dietary preferences or restrictions. For example, if you are looking to reduce the calorie content of a dish, you could swap high-fat ingredients for lower-fat options or increase the proportion of vegetables in the recipe. Experiment with different substitutions to find a combination that suits your taste preferences and nutritional goals. Remember to consider any potential allergens or intolerances when selecting alternative ingredients.