Peel and cube the sweet potato into small, uniform pieces to ensure even cooking.
Heat the avocado oil in a large non-stick skillet over medium-high heat.
Add the sweet potato cubes to the skillet and cook for 8-10 minutes, stirring occasionally, until they are tender and golden brown.
Crumble the tempeh into the pan and add the diced red onion and bell pepper, sautéing for another 5 minutes until the vegetables soften.
Stir in the rinsed black beans, sea salt, smoked paprika, and garlic powder, cooking until the mixture is fragrant and heated through.
In a small bowl, whisk together the non-fat Greek yogurt and lime juice until smooth and creamy.
Transfer the hash to a serving bowl and top with the sliced avocado, hemp seeds, and a generous dollop of the lime-yogurt sauce.