In a sauté pan, over medium heat, add 1 tbsp of olive oil and cut sweet potatoes cubes. Allow sweet potatoes to cook, browning evenly on all sides for about 5-7 minutes
Add black beans, cumin, chili powder, salt/pepper. Gently mix together and allow to cook over medium/low heat for 2-3 more minutes.
Meanwhile prepare slaw
In a small bowl combine the chopped red onion, radish, and jalapeno. Add lime juice/zest, salt/pepper. Mix together gently and set aside
To prepare tacos
in a dry sauté pan heat tortilla shells until just beginning to show color (about 1 minute on each side).
Next add a large spoonful of the cooked quinoa to the center of the shell
Top the quinoa with a large spoonful of sweet potato and black mean mixture. Top it all off with a spoonful of the radish slaw
Add an additional squeeze of lime or a slice or two of avocado and enjoy!