Note that measures are approximate. I have a lunch plastic
container, and I simply fill it all the way.

Ingredients (use vegan versions):

• 1-2 cups of cooked rice, half of it wild rice, half of it basmati
  
• 1 can of slided water chestnuts
  
• 1 salad tomato, chopped
  

Put into plastice container. Then add:

Ingredients (use vegan versions):

• sliced fresh mushrooms as necessary to fill the container almost to the rim
  

Then dump on top (DO NOT MIX. If you mix it, the rice will
be too soggy come lunch time. Mix before nuking):

Ingredients (use vegan versions):

• 1/2 can of Hunts tomato sauce
  
• black pepper to taste
  
• oregano to taste
  

At work, when hunger hits, nuke for 3-5 minutes, depending on the
microwave you are using. I like stuff cooked right, so I use 5 minutes
to get the tomatoes nice and done.