What is symbolic of poor cooking in your country?

In Britain when someone can’t cook, the most common thing they’ll say is “I can’t even boil an egg”

I wondered if other countries have a different food of reference when people are talking about their cooking skill?

For example, I was just watching Spanish TV and someone said ‘I can’t even make a croqueta’.

What would a poor cook say in your country? “I can’t even….”