Preheat your oven to 400°F (200°C) and line a baking sheet with parchment paper.
Slice each zucchini in half lengthwise and use a small spoon to scoop out the center flesh, creating a hollow boat shape.
Place the zucchini boats on the prepared baking sheet and roast for 12 minutes until they are slightly tender but still hold their shape.
While the zucchini is roasting, heat the ghee in a large skillet over medium heat.
Add the minced garlic and red pepper flakes to the skillet, sautéing for about 1 minute until the mixture is highly aromatic.
Increase the heat slightly and add the shrimp to the skillet, cooking for 2-3 minutes per side until they turn pink and opaque.
Stir in the lemon juice, sea salt, and black pepper, tossing the shrimp to ensure they are well coated in the garlic butter sauce.
Remove the zucchini boats from the oven and carefully spoon the shrimp and sauce into the hollowed-out centers.
Sprinkle the parmesan cheese evenly over the top of the shrimp boats and return them to the oven for 3 minutes until the cheese is melted and bubbly.
Garnish with freshly chopped parsley and serve immediately while hot.