Preheat your oven to 425°F (220°C).
On a cutting board, cut the sweet potatoes into 1/2" cubes.
In a large oven safe skillet, toss the sweet potato wedges with olive oil, salt, and pepper.
Bake the sweet potatoes for 30 minutes, flipping them halfway through cooking, until tender and slightly golden brown.
Once the sweet potatoes are cooked, remove them from the oven and reduce the heat to 375°F (190°C).
On a cutting board, cut the steak into 1" pieces.
Add the cooked black beans and steak pieces to the sweet potato skillet. Stir to combine.
Return the skillet to the oven and bake for an additional 5 minutes, just to heat the steak and beans through.
Remove the skillet from the oven and top with sliced avocado, dollops of sour cream or dairy-free sour cream, and a sprinkle of chopped green onions.
Serve immediately and enjoy!