ingredient (n.) /ɪnˈgriːdiənt/ one of the different foods that a particular type of food is made from
(frying) pan (n.) /pæn/ a metal container with a handle that is used for cooking food in
kinda: informal for kind of
leftover (n.) /ˈleftˌəʊvər/ the food that you have left when you have finished eating
The way the information is organized here is called a flowchart. This flowchart shows the process that many people who want to learn how to cook undertake.
The underlying idea of this comic is that when people in the US try to cook, they buy many ingredients, cook a little bit of food that is not really good, and waste a lot of food afterwards (throwing away leftovers and other ingredients because the food is not good anymore).
Notice that at each step, the reader follows what the next step is according to his situation, but here, the process is straightforward and there is only one possible way to learn cooking (according to the author) …
You may think this comic is too simple, but if you have lived in the USA, you would realize that it accurately represents the process that they go through. Not many people cook on a daily basis in the USA. Leaning to cook is not very high on the priority list!