01 - Preheat the oven to 425°F. Line a baking sheet with parchment paper.
02 - In a large bowl, combine diced sweet potatoes with olive oil, smoked paprika, cumin, chili powder, sea salt, and black pepper. Toss until evenly coated.
03 - Spread seasoned sweet potatoes in a single layer on the prepared baking sheet. Roast for 25-30 minutes, flipping halfway through, until golden brown and tender when pierced with a fork.
04 - Rinse brown rice under cold water until water runs clear. Combine rice, water, and salt in a saucepan. Bring to a boil over high heat, then reduce heat to low, cover, and simmer for 30-35 minutes until water is absorbed. Remove from heat and let stand covered for 5 minutes before fluffing with a fork.
05 - Combine drained black beans, cumin, smoked paprika, garlic powder, salt, and pepper in a small saucepan over medium heat. Stir frequently until warmed through, about 3-5 minutes.
06 - Halve the cherry tomatoes. Dice the avocado into 1/2-inch pieces. Finely dice the red onion. Roughly chop the cilantro. Cut the lime into 8 wedges.
07 - Divide cooked brown rice evenly among four bowls. Arrange roasted sweet potatoes, seasoned black beans, cherry tomatoes, corn, avocado, red onion, and cilantro on top of the rice in sections.
08 - Drizzle with vegan sour cream or coconut yogurt if desired. Squeeze fresh lime juice over the top and add hot sauce to taste. Serve immediately while warm.