Preheat your oven to 400°F (200°C) and line a large baking sheet with parchment paper for easy cleanup.
Slice the sweet potato into uniform 1/2-inch thick wedges and place them on one side of the baking sheet.
Toss the sweet potatoes with a small amount of the sea salt and pepper, then roast for 15 minutes.
Add the trimmed green beans to the other side of the baking sheet and continue roasting for another 10-12 minutes until the potatoes are tender and the beans are slightly blistered.
While the vegetables finish roasting, heat the ghee in a large skillet over medium-high heat.
Add the minced garlic to the skillet and sauté for about 30 seconds until fragrant, being careful not to let it burn.
Pat the shrimp dry and add them to the skillet in a single layer, seasoning with the remaining salt, pepper, and dried oregano.
Cook the shrimp for 2-3 minutes per side until they turn pink and opaque, then remove from heat and drizzle with fresh lemon juice.
Plate the garlic shrimp alongside the roasted sweet potatoes and green beans, drizzling any remaining garlic butter from the pan over the top.