Indian food in microwavable pouches that don't need to be frozen. Ready to eat in 90 seconds. Available in Indian grocery stores for $1.50 or less. A huge variety of vegetarian entrees compared to American microwave food and less bland too.
When I first got divorced, I ate curry in a hurry every day for lunch. I felt a little awkward buying them 30 at a time at the Indo-Pak market.