Preheat your oven to 400°F and line a large rimmed baking sheet with parchment paper.
Slice the bell pepper into strips and the carrots into thin rounds.
Place the broccoli, bell pepper, and carrots on the baking sheet and toss with olive oil, sea salt, and black pepper.
Roast the vegetables for 15-18 minutes until they are tender and show slight caramelized edges.
While the vegetables roast, pat the cod fillets completely dry with a paper towel.
Season both sides of the cod with ground turmeric, garlic powder, and a pinch of salt.
Heat avocado oil in a stainless steel or cast iron skillet over medium-high heat until shimmering.
Carefully place the cod in the pan and sear for 3-4 minutes without moving it to develop a golden crust.
Flip the fillets and add the ghee to the pan, spooning the melted ghee over the fish for the final 2-3 minutes of cooking.
Remove the fish once it is opaque and flakes easily with a fork.
Plate the golden cod alongside the roasted vegetables and finish with a fresh squeeze of lemon juice.