You can always microwave oatmeal. Here's a good recipe that you can make ahead and freeze, then reheat in the microwave as needed. I found it here:
http://allrecipes.com/Recipe/Vegetable-Quiche-Cups-to-Go/Detail.aspx
Vegetable Quiche Cups to Go
NGREDIENTS
* 1 (10 ounce) package frozen chopped spinach
* 3/4 cup liquid egg substitute
* 3/4 cup shredded reduced-fat cheese
* 1/4 cup diced green bell pepper
* 1/4 cup diced onion
* 3 drops hot-pepper sauce (optional)
DIRECTIONS
1. Microwave the spinach for 2 1/2 minutes on high. Drain the excess liquid.
2. Line a 12-cup muffin pan with foil baking cups. Spray the cups with cooking spray.
3. Combine the egg substitute, cheese, peppers, onions, and spinach in a bowl. Mix well. Divide evenly among the muffin cups. Bake at 350 degrees F for 20 minutes, or until a knife inserted in the center comes out clean.
Notes
Quiche cups can be frozen and reheated in the microwave. Any combination of appropriate vegetables and reduced-fat cheeses may be used.
***ETA that if you go to the website you'll find a link for reviews of this recipe with lots of suggestions and variations.