sandwich is

A sandwich is a food-eating
technique

whereby
foods that would be inconvenient
to eat with bare hands

are contained

by some kind of
cooked cereal paste. Handy
for holding and taking bites. 

It is 
considered 

a rude lunch
or snack, or 

breakfast, if 
the food inside 
is breakfast food 
like pancakes, or 
cold cereal, 

or dinner. If you are 
slovenly, leading 
meaningless lives, 
incapable or just 
uncaring of proper 
dinner, sure.  

A sandwich is 
the salutary solution 
to so many foods 
you
want
to take in hand.