Preheat your oven to 400°F and line a large rimmed baking sheet with parchment paper.
Trim and halve the Brussels sprouts and peel and cube the sweet potato into half-inch pieces.
Place the sprouts and sweet potatoes on the baking sheet, toss with half of the olive oil, salt, and pepper, then roast for 20-25 minutes until tender.
While the vegetables roast, heat the remaining olive oil in a large skillet over medium-high heat.
Add the shrimp, minced garlic, and dried oregano to the skillet, cooking for 2-3 minutes per side until the shrimp is pink and opaque.
Stir in the chopped kale during the final minute of cooking, tossing until it is just wilted and bright green.
Remove the skillet from the heat, drizzle with fresh lemon juice, and serve immediately alongside the roasted vegetables.