Begin by rinsing the four cod fillets under cold water, then gently pat them dry with paper towels. Season both sides of the fillets generously with salt and pepper.

In a large skillet, heat 2 tablespoons of olive oil over medium heat until shimmering. Add the minced garlic and sauté for about 1 minute until fragrant and lightly golden.

Add the diced tomatoes, dried oregano, and red pepper flakes to the skillet, stirring well. Let it simmer for about 5 minutes.

Gently place the seasoned cod fillets into the skillet. Spoon some sauce over the fillets, cover, and let it simmer for 10-12 minutes until the cod flakes easily.

Remove from heat and garnish with fresh basil leaves before serving hot.