Warm up the brown rice, kidney beans, corn, and salsa in a non-stick pan.
Add the spinach and warm it up just enough so it wilts.
Meanwhile, warm up the tortillas with a few seconds in the microwave.
Scoop about 1/2 cup of the mixture onto a warm tortilla on a plate. Add about 1/4 of an avocado, and wrap tightly. Enjoy!