One of my favorite ways to use left overs or to make a meal stretch is to make it into a salad.  Chopped up bits of london broil or chicken along with some cheese and dressing and you've got dinner.  
Enjoy! XO  Martha

Pantry Must Haves:
At least 1/2 a head or 1/2 a bag of lettuce
leftover meat chopped up
a handful of crumbly or chopped up cheese
various veggies, fruits or nuts you like
Your favorite dressing
How tos:

Toss lettuce, and veggies together.  
Top with meat and cheese and drizzle on dressing.  Serve immediately and devour!