Today cooking from scratch means unwrapping a variety of pre-made foods, mixing them together and nuking it on high for a few minutes! This is not scratch cooking and doesn't teach us anything about our food, allow us control over ingredients, and it certainly doesn't make our food any healthier!
Only a few generations ago all cooking was done completely from scratch! The local market only offered the most basic ingredients - the typical household cook transformed these ingredients to make every part of the meal! People preparing these meals understood where their food came from, how their actions and food choices impacted the environment and their health, and really knew how to cook.
Learn how to prepare an entire meal completely from scratch! In other words - create a meal from the most basic of ingredients with no one else combining any two ingredients but you! From a seemingly simple meal such as hot dogs and fries to something more complicated such as a four course meal learn how to make everything entirely from scratch! From cheese to butter to bread to ketchup - take control of your health and your kitchen. There is no more rewarding way to cook!