Prepare the Cod: Use paper towels to pat the cod fillets dry. Season both sides with salt and pepper to your liking.

Sear the Cod: In a large skillet, heat the olive oil over medium heat. Add the cod fillets to the pan and cook for 3–4 minutes on each side, or until they are golden brown and fully cooked. Remove the fillets and set them aside on a plate.

Sauté the Garlic: In the same skillet, reduce the heat to medium-low and add the butter. Once melted, stir in the minced garlic and cook for 1–2 minutes until fragrant.

Add the Asparagus: Increase the heat to medium and add the asparagus pieces to the skillet. Toss them in the garlic butter and cook for 4–5 minutes until tender-crisp.

Add Lemon Flavor: Stir in the lemon juice, lemon zest, and red pepper flakes (if using). Let the mixture simmer for 1–2 minutes to blend the flavors.

Bring It Together: Place the cod fillets back into the skillet and drizzle the garlic butter sauce over them. Heat gently for 1–2 minutes. Plate the cod and asparagus together, drizzling any remaining sauce over the dish. Serve immediately.