Heat olive oil in saute pan.
Chop sweet potato evenly (so that it cooks at the same rate), add to pan, and cook over medium heat. Stir every couple minutes so it does not burn.
While the sweet potato is cooking, chop the onion & Anaheim chiles.
Once the sweet potato is nearly cooked through, add the onion & chiles. You will know when they are nearly fork tender, or tender enough to stab with a fork. They should still be a little undercooked at this point.
Add the spices, and stir to combine while the vegetables cook.
Continue to allow the vegetables to cook, and once the onions become translucent, add the drained black beans and stir to combine.
Add the scant 1/2 cup chicken broth, and cover the mixture with a lid so that the moisture is retained, and the veggies continue to cook for a few minutes.
Once the broth is evaporated & sweet potato is completely cooked through, it's ready to eat!
Build your burrito bowl with the sweet potato black bean mixture, and serve over cauliflower rice.