Rinse the beans thoroughly (no need to soak overnight), then place in your slow cooker. Sprinkle with the taco seasoning, add water, and stir just to combine. Place the chicken on top, then cover with the salsa. Cover and cook for 4-5 hours on high or 7-8 hours on low.

If possible, check on it about halfway through and give it a stir, just to make sure your beans aren't sticking to the bottom of your slow cooker. (If you're at work, no worries, everything will be just fine.)

Note: Towards the end of the cooking time, it may look like you still have a lot of liquid left - this liquid will settle once you turn off the heat, and will get soaked up by the chicken once it's shredded.

Once the beans and chicken are cooked through, use two forks to shred the chicken (I was almost able to do this with my wooden spoon, it was so tender). At this point, give it a taste for seasoning, and add salt as needed. I added a heaping teaspoon of salt to mine, but if your taco seasoning contains any salt, you may need less, so be sure to taste it first.

Keep warm until serving or cool slightly before making freezer burritos.

Heat the oil in a medium pot over high heat. Add the onion and garlic and cook for 1-2 minutes, until the onion starts to soften. Add the cumin, stir to combine, then add the rice, allowing the rice to toast for a minute or two. Add the salt and stock and bring to a boil. Cover, reduce the heat to low, and simmer for 15-20 minutes, until the rice is cooked and no liquid remains. Remove from heat, fluff with a fork and either serve with the chicken or allow to cool slightly before making freezer burritos.

This process will go a little better if your fillings aren't piping hot, so let your chicken and rice cool slightly before assembling your burritos.

Wrap the tortillas in a damp paper towel and microwave on high for about 1 minute, or until just warm and pliable. Fill each tortilla with about 1/3 cup of the chicken and beans, 1/4 cup of the rice, and any additional toppings you desire. Make sure not to overstuff your burritos, or they will be hard to roll and harder to reheat later.

Roll your burritos and wrap them in foil. Label and store in the freezer for 2-3 months.

Note: If you make 8 burritos, you will have leftover chicken and rice. Place in an airtight container and either store in the refrigerator for a few days or in the freezer for a couple of months.

To reheat, unwrap a frozen burrito (no need to thaw!), wrap in a damp paper towel (if you find that your paper towels stick to the reheated burrito, try a damp dishcloth), and microwave on high for 3-4 minutes (times may vary depending on your microwave).