>you can switch the corn use from etanol to food

Not that easily. Yellow dent corn is not edible without processing. So to switch that to food use you have to have factories to deal with it.

You'd be far better off taking the energy from panels and using it greenhouses to get human feed.

Yellow corn is very popular here in Argentina. Things I ate this or last week:

* Home made popcorn: made from whole yellow corn grains.

* Corn on the cob: Sweet yellow corn. We just learned that you can microwave them for 6 minutes instead of boiling.

* Polenta: Grinded yellow corn. Add milk, butter and as much cheese as possible. You can buy the precooked grinded corn, and it takes less than 5 minutes. Bonus points for a sauce with tomato, onion, peppers, and red chorizo. [1]

* Humita/Tamales: Put some grinded corn wrapped inside the corn husk and boil it. I had not eat them since a long time ago, but they use also yellow corn here. I like it, but it requires a lot of preparation.

We use white corn only for food related to our two independence day:

* Locro: Mix split white hard corn, beans, pumpkin pieces, potatoes, pieces of meat with bone and whatever you can find. Boil it for hours and hours and hours. I probably eat it once or twice a year. [2]

* Mazamorra (porridge?): Mix split white hard corn with sugar and probably milk. Boil it until it's soft, that may take a very long time. I think I eat it once or twice in my life, for some patriotic celebration.

[1] https://www.paulinacocina.net/como-hacer-polenta-con-tuco/25...

[2] https://www.paulinacocina.net/receta-de-locro-argentino/9829

PS: As a rule of thumb, if you want to cook Argentinean food, just look at the site of "Paulina Cocina". She has simple but tasty recipes.