Where to list meals for travel?

Two questions:

 

- Where to put meals for travel? Under Travel with airfare and lodging, or under other business expenses?

 

- Do I understand correctly only meals from restaurants are 100% deductible, while other food is 50%? If so, how will the IRS know which is which. Do I need to separate them out on 2 different entries? It kind of stinks to be penalized for not eating restaurants. For a number of reasons, I feed myself from grocery stores when I travel