Preheat your oven to 400°F.
Slice the zucchini into half-inch rounds and toss them in a bowl with the olive oil, half of the sea salt, and half of the garlic powder.
Spread the zucchini in a single layer on a parchment-lined baking sheet and roast for 15-20 minutes until tender and slightly golden.
While the zucchini roasts, pat the tilapia fillets completely dry with paper towels to ensure a good sear.
Season both sides of the tilapia fillets with the remaining sea salt, black pepper, and garlic powder.
Heat the ghee in a large non-toxic skillet over medium-high heat until shimmering.
Place the tilapia in the skillet and sear for 3-4 minutes per side until the exterior is golden and the fish flakes easily with a fork.
During the final minute of cooking, add the minced garlic to the pan and squeeze the fresh lemon juice over the fish.
Remove from heat, garnish with freshly chopped parsley, and serve immediately alongside the roasted zucchini.