Prepare the Cod
Pat the cod fillets dry with paper towels to ensure a crisp sear.
Season both sides with salt and pepper.
(Optional) Lightly dredge the fillets in flour, shaking off any excess for a thin, golden crust.
Pan-Sear the Cod
Heat olive oil and butter (if using) in a large skillet over medium-high heat.
Place the cod fillets in the skillet and cook for 3–4 minutes per side, or until golden brown and cooked through. The fish should flake easily with a fork.
Remove the cod from the skillet and set aside on a plate.
Make the Sauce
In the same skillet, add a drizzle of olive oil and sauté the minced garlic over medium heat for 1 minute, or until fragrant.
Add the cherry tomatoes (or canned tomatoes) and cook for 3–5 minutes, stirring occasionally, until they begin to soften and release their juices.
Deglaze and Simmer
Pour in the white wine and broth, using a wooden spoon to scrape any browned bits from the bottom of the skillet.
Simmer the sauce for about 5 minutes, allowing it to reduce slightly and develop a rich flavor.
Finish the Sauce
Stir in the chopped fresh basil and red pepper flakes (if using).
Season the sauce with salt and pepper to taste.
Combine and Serve
Return the seared cod fillets to the skillet, spooning the sauce over the top.
Let the fillets simmer gently in the sauce for about 2 minutes to warm through.
Serve immediately, garnished with additional fresh basil.