Preheat your oven to 400°F and line a baking sheet with parchment paper.
Peel and dice the sweet potato into half-inch cubes, then toss them on the baking sheet with half of the olive oil, sea salt, and black pepper.
Roast the sweet potatoes for 20 to 25 minutes, flipping halfway through, until they are tender and caramelized on the edges.
While the potatoes roast, whisk together the remaining olive oil, garlic powder, smoked paprika, and lemon juice in a medium bowl.
Add the peeled and deveined shrimp to the bowl, tossing well to ensure every piece is coated in the zesty marinade.
Heat a large non-stick skillet or grill pan over medium-high heat and add the sliced bell peppers, sautéing for 3 to 4 minutes until slightly softened.
Push the peppers to the side of the pan and add the shrimp, cooking for 2 to 3 minutes per side until they are pink, opaque, and slightly charred.
Remove from heat and serve the zesty shrimp and peppers immediately over the bed of roasted sweet potatoes.