Season the tilapia fillets with salt and pepper on both sides.

Heat olive oil in a large skillet over medium heat. Add the tilapia fillets to the skillet and cook for about 3-4 minutes on each side until they are golden brown and cooked through. Remove the cooked fillets from the skillet and set them aside.

In the same skillet, add chopped onion and minced garlic. saute until the onion becomes translucent and fragrant.

Stir in the diced tomatoes, chopped basil leaves, dried oregano, and red pepper flakes (if using). Simmer the sauce for about 10 minutes, allowing the flavours to meld together.

Return the cooked tilapia fillets to the skillet, nestling them into the tomato basil sauce. Cook for an additional 2-3 minutes to warm the fish and allow it to absorb some of the flavours from the sauce.

Garnish with fresh parsley and serve the pan-seared tilapia in tomato basil sauce hot, accompanied by your choice of sides such as rice, pasta, or vegetables.

You can customize the sauce by adding other herbs and spices according to your preference. This dish pairs well with a side of steamed vegetables or a fresh salad. Enjoy the tender and flaky tilapia in the delightful tomato basil sauce for a satisfying and flavourful meal.