Make a copy of the Google Doc "Exploring Sustainable & Nutritious", save it to your "Food Tech" folder in Google Drive
Highlight the aspects that you want to base your meal around
Look at the links below to get some ideas of how to make your meal Sustainable, and meeting the Perfect Plate model.
It is good technology practice to analyse outcomes that already exist before you embark on creating something new to meet a need.
Choose 4 different existing meals you have at home and analyse them to work out what is good about them, and what you could improve.
(The "Macaroni Cheese" is just an example, you can delete it or adjust it to suit a meal you commonly have at home.)
Keep repeating the cycle until you are happy and your stakeholders are happy with your final brief.
Keep refining your specifications until they define your outcome well.
Keep communicating with your stakeholders until they are content and you have all the feedback you need.
Keep considering the social and physical environment where your outcome will be used, and make adjustments as needed to suit.
Keep considering the broadest sense considerations, and make changes as needed.