Чому неправильно "Very delicious meal"?
'cause 'delicious' is a strong adjective and 'very' isn't usually used with them. So you can say 'delicious food', but not '<sub>very</sub> delicious food'.
The thought never crossed my mind that that was a rule...
Just like 'very beautiful' sounds incorrect to my ears.
What part of your translation was incorrect? If "meal/їжа" then because they are looking for food. That is what they give you in the hint and, more importantly, in the picture translation at the start of the lesson.