In a large bowl, toss the diced sweet potatoes with olive oil, cumin, smoked paprika, chili powder, salt, and pepper until evenly coated.
Spread the seasoned sweet potatoes on a baking sheet in a single layer. Roast in the oven for 25-30 minutes, or until tender and slightly crispy, flipping halfway through.
While the sweet potatoes are roasting, prepare the quinoa or brown rice according to package instructions.
In a separate bowl, mix the black beans, corn, halved cherry tomatoes, and red onion. Add a pinch of salt and a squeeze of lime to enhance the flavor.
Once the sweet potatoes are done roasting, remove them from the oven and let cool slightly.
To assemble the taco bowls, start with a base of quinoa or brown rice. Top with roasted sweet potatoes, the black bean-corn mixture, and slices of avocado.
Garnish with fresh cilantro and serve with lime wedges on the side for extra zest.
Notes
Feel free to customize with your favorite toppings.