Preheat your oven to 400°F (200°C) and line a large sheet pan with parchment paper for easy cleanup.
Chop the broccoli, red bell pepper, and zucchini into uniform bite-sized pieces to ensure even roasting.
Place the vegetables on the prepared baking sheet and toss with half of the olive oil, sea salt, and black pepper.
In a small shallow bowl, whisk together the almond flour, smoked paprika, and garlic powder.
Pat the cod fillets dry with a paper towel, then brush the tops with the remaining olive oil.
Press the oiled side of each fillet firmly into the almond flour mixture to create a thick crust and place them on the pan next to the vegetables.
Bake for 12 to 15 minutes until the vegetables are tender and the cod is opaque and flakes easily with a fork.
Remove from the oven and drizzle the fresh lemon juice over the fish and vegetables before serving immediately.