Preheat your oven to 400°F and line a baking sheet with parchment paper.
Spread the diced sweet potato and crumbled tempeh on the tray, seasoning with a pinch of sea salt and black pepper.
Roast for 20 minutes until the sweet potatoes are tender and the tempeh is slightly crisp.
While roasting, heat a large pot over medium heat and sauté the red onion and bell pepper with two tablespoons of vegetable broth until softened.
Stir in the chili powder, cumin, and garlic powder, cooking for one minute until fragrant.
Pour in the black beans, tomato puree, and the remaining vegetable broth, then bring the mixture to a gentle simmer.
Fold in the roasted sweet potatoes and tempeh, allowing the flavors to meld for 10 minutes.
Remove from heat and stir in the nutritional yeast and lime juice before serving.