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" I&amp;#039;m enjoying the meals on the Supermarket Diet, but sometimes I&amp;#039;d like to substitute some foods for others. Can I do this? Not only is it okay to substitute, I recommend doing so as a way to multiply the recipes you have on hand. But, as it says in the book, you have to substitute like foods for like foods. Otherwise, you could go into calorie overload.  It&amp;#039;s nearly impossible to go wrong with veggies. Most are about 25 calories per cup. But there are some exceptions: Lettuce is lower in calories, and carrots and beets are higher. Still, these differences are negligible, so it&amp;#039;s fine to swap them with greens, tomatoes, cucumbers, and other watery vegetables. Potatoes, sweet potatoes, peas, and corn are very starchy, with significantly higher calorie counts. You should never swap them with other veggies. In fact, they&amp;#039;re so starchy, you can sub them for a grain: A heaping 1/2 cup of potatoes is about 80 calories -- the same as a slice of bread or 1/2 cup cooked rice or pasta. Another exception: avocados. Their high-fat content makes them high in calories as well. Two tablespoons of pureed avocado has 48 calories, about the same as 1 teaspoon of oil or margarine. Want to swap chicken for pork tenderloin? Go ahead. Three ounces of cooked skinless chicken replaces 3 ounces of cooked pork tenderloin. In general, it&amp;#039;s okay to swap 3 ounces of chicken with the same amount of fish and lean meat such as beef tenderloin and flank steak. "^^<http://www.w3.org/2001/XMLSchema#string>
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