Dietary Reference Intake (DRI) states that an adult needs 0.8 grams of protein per kilogram or 0.36 grams per pound of body weight. Even using a conservative estimate, this works out to an average male consuming 56g of protein daily and an average female consuming 46g.
In contrast to animal protein, plant protein is not as easily absorbed by humans. To compensate for their lower absorption in the body, you will need to significantly increase your intake of plant proteins.
Each meal weighs between 300 and 400 grams for one person.