After Cher joined the team (it seems to be the fourth chapter), the heroine joined her in the battle queue and could cook twice in a row. In the future, whether there is Cher in the team or not, she can do it directly (sometimes she may have to say more).
It seems that the hero didn't cook for you until the elf Cher was in the combat team. I didn't try it when I used a man. At first, I didn't need to cook. Later, because there were basically Cher in the men's home team, I pulled her into the queue when I was cooking. Maybe just like the hostess. There may also be chapter restrictions. Anyway, it's definitely right to take Cher.
As for the place where food is used in the game, there are only two places in my mind. One is the task of feeding food in the mother worm's stomach. I suggest you use the "barbecue menu" to make "turkey and vanilla roast", which is beneficial to mass production and is beneficial. It pushes the task forward quickly and is more effective than feeding most other foods.
The other is the love group at the entrance of Pa rufina Temple. Send "secret flowers" for the first time, "rock lizard stew" for the second time (rough formula), and send light sand for the third time, and you will succeed.
Everything else seems to be gone, LZ, look at the above.