Diet Secrets of 'Hungry Girl': Can You Lose 25 Pounds by Super-Sizing?

"Hungry Girl" creator Lisa Lillien explains how huge portions of low-calorie foods can help you lose weight.
3:00 | 04/02/14

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Transcript for Diet Secrets of 'Hungry Girl': Can You Lose 25 Pounds by Super-Sizing?
We'll be watching "Nashville.." This probably sounds too good to be true. "Hunger girl." "The New York times," best-selling author Lisa lillien says you can supersize your food and still lose weight? And the best part is you can drop pounds in under one month. ABC's Abbie Boudreau tells us about this seemingly dreamy diet. Reporter: Really good. A heaping plate of chicken Alfredo. This is definitely a go to. Sweet potato tries and pizza for a sneak. Feels like a meal and not a snack. Chocolate stuffed strawberries for a snack. You mean one. All of them. Reporter: Sound like a diet to you? Best-selling author and former food network hungry girl Lisa lillien says it is. And swears her supersizing four-week plan can help you lose a lot of weight. You call this a diet but we're also talking about huge portions. I'm all about swapping foods. Making better choices so can bigger really be better? That's what "The hungry girl diet" is all about. You get a lot of bang for your buck. Reporter: She is out with a new book, "The hungry girl diet" which isn't just for girls, by the way. It's all about huge portions but small calorie counts, a total of around 1300 a day. Litt she says food swapping is your key. That's your secret. One of the best in the world. Reporter: To Fuhr tir achayaki noodles. It's a regular serving which is what you basically get for 350 calories and this is about 350 calories or so and you get a huge portion. Reporter: Other favorite food swaps she says even kids love of the use high fiber cereals to bread chicken fingers or broccoli slaw as a pasta substitute in the sloppy Jane stir fry. It's not so much of an extreme measure but addresses cravings and doesn't make you feel like you've left your old world. Reporter: As for big portions look at this bowl of hungry girl's oatmeal we whipped up. Twice the cooking time and twice the liquid and her secret ingredient. Pumpkin puree, high in fiber and adds favor and texture. The happy oatmeal dance. Saving may be the best for last. Low fat ricotta stuffed strawberries with chocolate chips on top, only 100 calories. And you can eat all of them. Sure, why not. Cheers. The kind of guilt-free diet you could get used to. For "Good morning America," Abbie Boudreau, ABC news, los Angeles.

This transcript has been automatically generated and may not be 100% accurate.

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