Preheat oven to 400 degrees Fahrenheit (200 degrees Celsius).
In a bowl, toss sweet potato cubes with 1 tablespoon olive oil, 1/4 teaspoon salt, and 1/2 teaspoon smoked paprika.
Spread sweet potatoes in a single layer on a baking sheet and roast for 20 minutes until tender.
While potatoes roast, season steak cubes with garlic powder, onion powder, remaining smoked paprika, remaining salt, and black pepper.
Heat remaining 1 tablespoon olive oil in a large cast-iron skillet over medium-high heat.
Add steak bites to the skillet in a single layer and sear for 2-3 minutes per side until browned.
Remove steak from skillet and set aside; add chopped bell peppers to the same skillet.
Sauté peppers for 4 minutes until slightly softened and charred.
Incorporate the roasted sweet potatoes and seared steak bites back into the skillet and toss to combine.
Garnish with fresh parsley and serve immediately.