Preheat oven to 400°F and line a large baking sheet with parchment paper.
Press the tofu to remove excess moisture, then cut into 1-inch cubes.
Peel and dice the sweet potato into 1/2-inch cubes.
In a large bowl, toss the tofu and sweet potato with olive oil, cumin, chili powder, salt, and pepper.
Spread the mixture in a single layer on the baking sheet and roast for 25 minutes until the sweet potato is tender and tofu is golden.
While roasting, rinse and drain the black beans.
Remove the tray from the oven, add the black beans, and sprinkle with nutritional yeast and hemp seeds.
Return to the oven for 5 minutes to warm the beans.
Divide the fresh spinach between two bowls and top with the roasted mixture.
Drizzle with lime juice before serving.