The phrase "measured portions" refers to carefully measured or controlled amounts of something, such as food or substances, to ensure accuracy and balance. Full definition
Your child probably will need to eat carefully measured portions of fruits, vegetables, and low - protein cereals, bread, and pasta. (webmd.com)
We'll not only tell you, but also we'll provide you with an option that is both easier and more effective than constantly measuring portion sizes and calculating calories! (lasting-weight-loss.com)
I think I'll start measuring portions so I can be more specific about what each portion size entails. (kitchentreaty.com)