Preheat your oven to 425°F.
Cut the potato into wedges. Toss them with olive oil, salt, and pepper, and spread them on a baking sheet.
Place the potato wedges in the oven and roast for about 25-30 minutes, turning halfway through until golden and tender.
While the potatoes are roasting, pat the cod fillet dry with paper towels. Season both sides with salt and pepper.
In a shallow dish, mix the almond flour with a pinch of salt and pepper. In another bowl, lightly beat the egg white.
Dip the cod fillet in the egg white, then coat it evenly with the almond flour mixture.
Place the coated cod on a parchment-lined baking tray. Bake in the preheated oven for 12-15 minutes or until the cod is opaque and flakes easily with a fork.
Once both elements are cooked, serve the crispy baked cod alongside the roasted potato wedges.